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Your search returned over 400 essays for "rate of reaction"
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Taking a Closer Look at Reaction Rate - Reaction Rate is the measure of how quickly an organism’s neurons can communicate or react to a type of stimulus. In other words it is how fast an organism’s neurons can send signals to the brain and from the brain. The anatomy of a classic neuron is rather simple. A classic neuron comprises of a body and a tail. The body has a nucleus with arms protruding outwards, these are called dendrites. Dendrites are the postsynaptic neurons for synaptic communication, they receive neurotransmitters from the presynaptic neurons....   [tags: neuron reaction] 1304 words
(3.7 pages)
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What Affects the Rate of Reaction? - What Affects the Rate of Reaction. Hypothesis To form a reaction the particles must collide in high speed. The faster the particles collide the more kinetic energy is produced. This produces a bigger reaction. There are five key variables that affect the rate of a reaction (in this case with a solid and a solution): * Change in temperature An increase in heat energy within the particles leads to more kinetic energy. Therefore there is more collision of particles and it increases the rate of the reaction....   [tags: Reaction Rates Energy Science Essays] 2334 words
(6.7 pages)
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The Effect of Concentration on Reaction Rate - The Effect of Concentration on Reaction Rate Introduction: In this experiment, we utilized the ability for the iodide ion to become oxidized by the persulphate ion. Our general reaction can be described as: (NH4)2S2O8 + 2KI à I2 + (NH4)2SO4 + K2SO4 (1a) However, we know that in an aqueous solution, all of these compounds except iodine will dissociate into their ionic components. Thus we can rewrite the equation in a more convenient manner: S2O82- + 2I- à I2 + 2SO42- (1b) It is important however to note that the NH4 and K ions are still in the solution, they are just unreactive....   [tags: Papers] 1842 words
(5.3 pages)
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The Effect of Concentration on Reaction Rate - The Effect of Concentration on Reaction Rate Introduction I will be carrying out an investigation into how concentration affects reaction rate. I will be looking at sodium thiosulphate and hydrochloric acid. The reaction is represented by the following equation: [IMAGE]Na2S2O3(aq) + 2HCl(aq) 2NaCl(aq) + H2O(l) + SO2 (g) + S (s) I will add the hydrochloric acid to the Sodium Thiosulphate and time how log it takes for the mixture to turn opaque. I will use a different concentration of Sodium Thiosulphate each time....   [tags: Papers] 408 words
(1.2 pages)
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Concentration And Reaction Rate - How concentration affects reaction rate. The aim of this investigation is to see how the concentration of a reactant in ratio to the reactor affects the rate of a reaction. When hydrochloric acid and Thiosulphate react together sulphur is liberated this means that as the reaction goes on the solution will become yellow and will change from being transparent to translucent to opaque. The sulphur is formed as a solid but not in the usual precipitation way. Na2 + S2 + 2HCL 2NaCl+SO2 + S2 +H2O To time the reaction I will draw a black cross on a piece of plain paper on which the beaker of reactants will be placed (HCL and Thiosulphate)....   [tags: essays research papers] 3329 words
(9.5 pages)
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The Affect of Changing the Concentration on the Rate of Reaction - The Affect of Changing the Concentration on the Rate of Reaction To find out the affect of changing the concentration on the rate of reaction Scientific background Collision theory: Collision theory explains how chemical reactions occur and why rates of reaction differ. For a reaction to occur, particles must collide. If the collision causes a chemical change it is referred to as a fruitful collision and it's a Theory that explains how chemical reactions take place and why rates of reaction change....   [tags: Collision Theory Reaction Rates Essays] 1086 words
(3.1 pages)
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Different Variables Changing the Rate of Reaction - Different Variables Changing the Rate of Reaction To show that different variables can change the rate of reactions e.g. make them faster or slower. Theory: - That changing the variables in a reaction such as concentration, temperature and surface area will increase or decrease the rate of reaction. This would happen because, if you changed the concentration of a solution to a higher concentration the rate of reaction would increases, as there are more particles in the solution which means the particles would collide more....   [tags: Reaction Rates Science Gases Essays] 942 words
(2.7 pages)
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Reaction Rate Investigation - Reaction Rate Investigation Planning I am trying to work out the rate of reaction between marble chips (calcium carbonate) and Hydrochloric acid. This will be my plan of how to carry out my investigation. There are many factors, which I could change in this experiment. These are 1) Concentration. An increase in concentration means there are more particles. More particles means there will be more collisions. 2) Surface Area. Breaking the solid into smaller pieces will increase the surface area exposed to the other reactant....   [tags: GCSE Chemistry Coursework Investigation] 931 words
(2.7 pages)
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Analysis of the Half-Life of a Substance - The rate of a reaction would be the change of concentration of a reactant divided by the time (Green & Damji 161). The rate law is an expression deduced to show the relation of rate to the concentrations of the reactants in a chemical reaction. The rate law equals the rate constant, multiplied by the concentration of the reactants raised to their respective reaction orders (Green & Damji 170). The rate law of the equation given above is: k is the rate constant (given in M/sec or sec-1 or M-1sec-1) A is first reactant and [A] is the concentration of the first reactant (given in M) m is the order with respect to A * Any reactant in brackets refers to the concentration of the particular reac...   [tags: chemical reaction, rate law, reaction order]
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2012 words
(5.7 pages)
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The Relationship Between Reaction Rate and Concentration - The Relationship Between Reaction Rate and Concentration I am going to investigate how varying the concentration of Sodium thiosulphate solution affects the rate of reaction with Hydrochloric Acid. The equation for the reaction is: [IMAGE]Sodium thiosulphate + Hydrochloric Acid Sodium Chloride + Water + Sulphur + Sulphur dioxide [IMAGE]Na2S2O3(aq) + 2HCl(aq) 2NaCl(aq) + H2O(l) + S(s) + SO2(aq) This reaction has a definite end (when the cross on the test tube 'disappears')....   [tags: Papers] 1051 words
(3 pages)
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The Rate of Reaction - The Rate of Reaction Introduction ============ The rate of reaction is how fast/the speed at which a chemical reaction takes place. The rate of reaction is found by measuring the amount of a reactant used up per unit of time or the amount of a product produced per unit of time. The rate of reaction is at its fastest speed in the beginning of the reaction & gradually slows down. Some of the things that affect the rate of reaction are: * Concentration * Light * Surface area * Temperature * Using a catalyst * Pressure All these things can affect the rate of reaction because they can increase the chances of successful collisions...   [tags: Papers] 719 words
(2.1 pages)
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Rate of Reaction of Dilute Hydrochloric Acid and Sodium Thiosulphate - Rate of Reaction of Dilute Hydrochloric Acid and Sodium Thiosulphate To investigate the change in rate of reaction between DILUTE HYDROCHLORIC ACID and SODIUM THIOSULPHATE as the concentration varies. PLAN A chemical reaction takes place over a specific period of time i.e. which is the time for the reactants to be formed into the products. If the reactants take a relatively short time to form the products, the reaction is known as a FAST one. The RATE of that particular reaction is high. On the other hand, a reaction which takes a longer time is known as a SLOW reaction, and as a result is known to have a LOW rate of reaction....   [tags: Reaction Rates Chemical Reactions Essays] 2286 words
(6.5 pages)
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Rate of Reaction Between Marble Chips and Hydrochloric Acid - Rate of Reaction Between Marble Chips and Hydrochloric Acid To investigate the factors which affect the rate of reaction between marble chips and hydrochloric acid, with one in specific detail. Scientific knowledge: Marble chips erode when they are exposed to acid rain or pollution. Erosion is evident when you look at older marble buildings as in certain cases the erosion take a long time. It is more likely to occur in areas, where there is more pollution. This is because there are a greater number of industries in city than in the countryside....   [tags: Reaction Rates Chemical Reactions Essays] 4512 words
(12.9 pages)
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The Influence of the Concentration of Amylase on Rate of Reaction - The Influence of the concentration of Amylase on rate of reaction Introduction Many of the reactions that take place in the human body precede much to slowly to happen without any help. In order for these necessary reactions to take place such as digestion and cell respiration an aid called an enzyme is needed (Cite). An enzyme is a protein, made up from chains of amino acids, that acts as a catalyst, facilitating a speedier reaction (Cite). The alignment of the amino acid chains contributes to the function of the enzyme....   [tags: Enzyme, Starch] 670 words
(1.9 pages)
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Rate of Reaction - Rate of Reaction Coursework Aim: To investigate how temperature affects rate of reaction. Introduction: I am going to investigate how temperature affects the rate of reaction of hydrochloric acid with calcium carbonate. This is the reaction that will take place: Hydrochloric acid + Calcium Carbonate è Calcium Carbonate + Water + Carbon Dioxide The rate of reaction can be measured in various different ways: * Using a balance you can check the mass before the reaction and then after the reaction has taken place....   [tags: GCSE Chemistry Coursework Investigation] 1851 words
(5.3 pages)
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Rate of Reaction - Rate of Reaction Aim: To watch and keep record of the effects of a change in concentration on the rate of reaction. Word equation: Hydrochloric Acid + sodium thiosulphate à Sulphur dioxide + Sodium Chloride + water 2HCl + Na2S203 à 2Na + SO2 + H2O Plan: In this experiment I will be testing the rate of reaction of Hydrochloric acid and Sodium Thiosulphate. The rate of reaction tells us how quickly a reaction happens, so I will increase the concentration of the hydrochloric acid each time I do the experiment, adding ¼ of distilled water to 2 molars of the acid therefore providing us with the concentrations 2, 1.5,1,0.5 and finally 0 to react with...   [tags: Papers] 847 words
(2.4 pages)
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Rate of Reaction - Rate Of Reaction Introduction I will be investigating the rate of reaction, which is the amount of substance taken for the reaction. Often the rate curve is a negative correlation. As we increase the temperature, the time taken for the cross to disappear will decrease. Other Information The most important factors that affect the rate of reaction are: Concentration of the acid Time taken for the cross to disappear Temperature Concentration of Sodium thiosulphate The reaction will not take place unless the particles will collide with each other....   [tags: GCSE Chemistry Coursework Investigation] 1824 words
(5.2 pages)
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Rate of Reaction - Rate of Reaction Aim: To find out how different concentrations change the rate of reaction Theory: In this experiment the collision theory is in use. It means that when the concentrates solutions of hydrochloric acid is use, more particles are found in the same space, which means they are more likely to collide with each other. the more the concentrated the solution, the more of the collisions with the particles, which increases the rate of reaction. Prediction: As the concentration of the solution increases the rate of reaction increases with it Hypothesis: The reason I think that my prediction is right, is because I know that more concentrated the solution is, the quicker the...   [tags: essays research papers] 895 words
(2.6 pages)
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The Effects of Concentration on Reaction Rate with Sodium Thiosulphate - The Effects of Concentration on Reaction Rate with Sodium Thiosulphate ---------------------------------------------------------------------- Planning ======== In this experiment I shall be varying the volume of sodium thiosulphate, hydrochloric acid and water, and measuring the reaction rate. When I increase the amount of sodium thiosulphate with less water, I think the time for the cross to disappear would be faster than there would be with little sodium thiosulphate and more water – taking in account the amount of hydrochloric acid is the same....   [tags: Papers] 1224 words
(3.5 pages)
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The Effect of Temperature on the Rate of Reaction - The Effect of Temperature on the Rate of Reaction Aim-We is going to investigate how temperature effects the rate of reaction when we use a Magnesium Ribbon and dissolve it in Hydrochloric Acid. Different Variables-There are four different variables that effect the rate of reaction, surface area, concentration, temperature and catalysts. Here is some information on each variable with diagrams. How does surface area effect rate of reaction. In a substance the rate of reaction will be quicker if it has a large surface area....   [tags: Papers] 1504 words
(4.3 pages)
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Factors That Affect the Rate of Reaction - Factors That Affect the Rate of Reaction Background ========== We can measure the rate of reaction by measuring the rate of change by either, - one of the reactants disappearing with time - one of the product forming with time. A chemical reaction can only occur between particles when they collide (hit each other). Particles may be atoms, ions or molecules. There is a minimum amount of energy which colliding particles need in order to react with each other. If the colliding particles have less then this minimum energy, then they just bounce off each other and no reaction occurs....   [tags: Papers] 2871 words
(8.2 pages)
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The Effect of Concentration on the Rate of Reaction - The effect of concentration on the rate of reaction between sodium thiosulphate and dilute hydrochloric acid This investigation is about rates of reaction and what affects them. In this case I am going to look at hydrochloric acid and sodium thiosulphate which is a precipitation reaction causing the solution to go 'cloudy'. They react as in the equations below: sodium thiosulphate + hydrochloric acid -> sodium chloride + sulphur + sulphur dioxide + water Na2S2O3(aq) + 2HCl(aq) -> 2NaCl(aq) + S(s) + SO2(g) + H2O(l) A reaction will only occur where the particles of the reactants meet and combine....   [tags: GCSE Chemistry Coursework Investigation] 2593 words
(7.4 pages)
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The Effect of Temperature on the Rate of Reaction - The Effect of Temperature on the Rate of Reaction Plan: We must produce a piece of coursework investigating the rates of reaction, and the effect different changes have on them. The rate of reaction is the rate of loss of a reactant or the rate of formation of a product during a chemical reaction. It is measured by dividing 1 by the time taken for the reaction to take place. There are five factors which affect the rate of a reaction, according to the collision theory of reacting particles: temperature, concentration (of solution), pressure (in gases), surface are (of solid reactants), and catalysts....   [tags: Papers] 970 words
(2.8 pages)
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The Effect of Temperature on the Rate of Reaction - The Effect of Temperature on the Rate of Reaction Plan We must produce a piece of coursework investigating the rates of reaction, and the effect different changes have on them. The rate of reaction is the rate of loss of a reactant or the rate of formation of a product during a chemical reaction. There are five factors which affect the rate of a reaction, according to the collision theory of reacting particles: temperature, concentration (of solution), pressure (in gases), surface are (of solid reactants), and catalysts....   [tags: GCSE Chemistry Coursework Investigation] 2348 words
(6.7 pages)
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The Effect of Concentration on the Rate of Reaction - The Effect of Concentration on the Rate of Reaction Aim: We are going to investigate how change in the concentration of acid affects the rate of reaction. Introduction: Chemical Reactions are caused when the particles collide with each other to react. This is known as collision theory. Particles need enough energy to make a successful reaction. This is called activation energy when the minimum amount of energy is present a reaction happens. The formula for the collision theory is ½ mv2.....   [tags: Papers] 751 words
(2.1 pages)
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The Effect of Concentration on the Rate of Reaction - The Effect of Concentration on the Rate of Reaction Planning AIM To look at the change in concentration on the rate of reaction BACKGROUND THEORY The rate of reaction tells us how quickly a chemical reaction happens. We can work it out after doing an experiment. We can measure how much reactant is used up in a certain time or how quickly products are formed. We then work out what 1/time taken is and that gives us the rate. The rate of the reaction can be affected by a number of things: Concentration Surface area Temperature Catalysts The collision theory The greater the surface area, the faster the rate of reaction....   [tags: Papers] 1268 words
(3.6 pages)
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The Rate of Reaction of an Enzyme - The Rate of Reaction of an Enzyme Prediction I think that as the temperature raises the rate of reaction will be quicker, until it gets to a certain temperature where the enzyme becomes denatured. The reasons why I believe that this will happen are due to my background research and also to my knowledge of particle theory. When a substance is heated the particles in that substance gain kinetic energy and move around more. This means that the particles collide more, and the more collisions the more energy, so as the enzyme heats up the particles will speed up making the reaction get quicker....   [tags: Free Essays] 399 words
(1.1 pages)
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An investigation into concentration and rate of reaction - An investigation into concentration and rate of reaction Aim: to determine the effect on rate of reaction of changing the concentration of sodium thiosulphate in the reaction sodium thiosulphate + Hydrochloric acid -> Sodium Chloride + sulphur dioxide + Sulphur + water. Scientific background A reaction is a change or transformation in which a substance decomposes, combines with other substances, or interchanges constituents with other substances. The particular reaction of sodium thiosulphate + Hydrochloric acid -> Sodium Chloride + sulphur dioxide + Sulphur + water or Na2S2O3 + 2HCl -> 2NaCl + SO2 + S + H2O....   [tags: Papers] 1198 words
(3.4 pages)
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The Effect of Temperature on the Rate of Reaction - The Effect of Temperature on the Rate of Reaction Aim The aim for this investigation is to carry out an experiment which I will be able to examine and measure the way temperature effects the rate of reaction in a number on conditions. The substances which will be used in my experiment to find how temperature effect the rate of reaction are Hydrochloric acid and Sodium thiosulphite they are going to be used at a range of different temperatures to maintain this, they are going to be placed in water baths programmed to get the substances to the right temperature before used in the experiment....   [tags: Papers] 1162 words
(3.3 pages)
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The Effect of Catalyst an the Rate Of Reaction - The Effect of Catalyst an the Rate Of Reaction Chemistry Coursework Does The Number of Drops of Catalyst Effect The Rate Of Reaction Candidate Name: Ben Dodds Candidate Number: 7158 School: Oundle School Completion Date: Introduction We are studying the reaction between zinc and sulphuric acid, the reaction is catalysed by copper sulphate and this experiment is to test whether the amount of drops effect the rate of reaction. Word Equation Zinc(s) + Sulphuric acid(aq) à Hydrogen(g) + Zinc Sulphate(aq) Symbol Equation Zn + H2SO4 à H + ZnSO4 This reaction is catalysed by Copper sulphate (CuSO4) Ionic Equation - Cancel Spectator ion (SO42-) Zn + 2H+ à Zn2+ + H2 For this reaction...   [tags: GCSE Chemistry Coursework Investigation] 1447 words
(4.1 pages)
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The Effect of Temperature on the Rate of Reaction - The effect of temperature on rates of reaction Aim: The aim of this experiment is to find out if the reaction rate of sodium thiosulphate solution and hydrochloric acid will be affected by a temperature change. Prediction: I predict that as a result of increasing the temperature of the sodium thiosulphate, the rate of reaction will be faster. Because of the increase in temperature, the particles will gain more kinetic energy. This will therefore cause them to move faster and produce more successful collisions, causing the rate to increase....   [tags: GCSE Chemistry Coursework Investigation] 1230 words
(3.5 pages)
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The Effect of Temperature on the Rate of a Reaction - The Effect of Temperature on the Rate of a Reaction Aim and Hypothesis The investigation that we have chosen to do is how the effect of temperature affects the rate of reaction of hydrogen peroxide to water and oxygen using the enzyme catalase. I predict that the higher the temperature the faster the rate of reaction will be and the more oxygen there will be given off....   [tags: Papers] 664 words
(1.9 pages)
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The Effect of Temperature on the Rate of Reaction - The Effect of Temperature on the Rate of Reaction Aim: The aim of this investigation is to find out the effect of temperature on rate of reaction I am going to investigate the changes caused to the solution of hydrochloric acid and sodium thiosulphate when the temperature is changed. Background Information: The rate of reaction varies greatly. Some chemical reactions, such as explosions, happen very quickly while others like rusting occur very slowly. The rate of reaction can be effected by a number of factors: temperature, concentration and pressuring adding a catalyst, surface area, particle size and light....   [tags: Papers] 898 words
(2.6 pages)
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The Effect of Concentration on the Rate of a Reaction - The Effect of Concentration on the Rate of a Reaction Aim- Our aim is to investigate the effect of concentration in the rate of a reaction. Method- Below is a step-by-step guide to exactly what we did to do the experiment. The first thing we did or we do in any experiment involving acid is put on safety goggles so we do not ruin our eyes. Ø We then went and gathered up the equipment to complete the experiment. The list is below: Ø A Balance (scales) Ø A gas syringe (100 cm cubed) Ø 3m Hydrochloric acid Ø A conical flask....   [tags: Papers] 1969 words
(5.6 pages)
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The Effect of Temperature on the Rate of Reaction - The Effect of Temperature on the Rate of Reaction Aim: To investigate the effect of temperature on the speed of reaction between: Sodium thiosulphate 25ml Hydrochloric acid 5ml Sodium thiosulphate + Hydrochloric acid àSodium chloride + Sulphur dioxide + Sulphur + Water Apparatus: · Beaker · Stopwatch · Thermometer · 25ml of Sodium thiosulphate · 5ml of Hydrochloric acid · Water bath Safety: Wear goggles at all times just in case a chemical splashes into your eye....   [tags: Papers] 384 words
(1.1 pages)
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Effect of temperature on rate of reaction - Effect of temperature on rate of reaction Aim: To find out if the temperature increases the rate of reaction of two chemicals. Prediction: My prediction is that the higher the temperature is the faster the rate of the reaction will be. Equipment: Hot water, thermometer, flask, cold water, stopwatch, tissue paper, paper with ‘X’ marked on it, safety glasses, measuring cylinder, large beaker, sodium thiosulphate, hydrochloric acid. Method: The experiment has to be done five times for the five different temperatures of the sodium thiosulphate....   [tags: GCSE Chemistry Coursework Investigation] 428 words
(1.2 pages)
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The Rate of Reaction Of Metals with Acids - The Rate of Reaction Of Metals with Acids Introduction In this investigation I will be looking at the rate of reaction between a metal, which will be magnesium ribbon, and an acid. The acids will either be hydrochloric, ethanoic, sulphuric or phosphoric acid. I will be finding out if the activation energy changes depending on whether a strong or weak acid is used. I will also be investigating whether or not there is a change in the order of reaction if a dibasic acid is used instead of a monobasic acid....   [tags: GCSE Chemistry Coursework Investigation] 2974 words
(8.5 pages)
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What Affects the Rate of Reaction - What Affects the Rate of Reaction In this investigation I am trying to find out how to change the rate of reaction between sodium thiosulphate and hydrochloric acid. Background Information In this investigation I am investigating with this reaction below: Sodium thiosulphate + Hydrochloric acid àSodium chloride + Water + Sulphur dioxide + Sulphur Na2S2O3(aq) + 2HCl(aq) à 2NaCl(aq) + H2O(l) + SO2 + S(s) In any chemical reactions, there are number of factors that can affect the rate of reaction, these are listed below....   [tags: Papers] 1923 words
(5.5 pages)
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Effect Of Temperature On Rate Of Reaction - Effect Of Temperature On Rate Of Reaction PLAN: In this investigation I will find out the effect of temperature on rate of reaction. To do this I will put a piece of paper with an "X" marked on it under a chronicle flask and carry out the reaction of with Hydrochloric Acid with the concentration of 2M and Sodium Thiosulphate solution and observe how long it takes for the reaction to finish. I will repeat this with different temperatures. Apparatus: * Timer * 50g dm-3 Sodium Thiosulphate solution (Na2S2O3) * 2M Hydrochloric Acid * Conical flask * Thermometer * Bunsen burner * Heat proof mat * Wire gauze * White t...   [tags: Free Example Essays] 413 words
(1.2 pages)
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The rate of reaction of Succinate dehydrogenase - The rate of reaction of Succinate dehydrogenase Introduction: Enzymes are protein molecules that function as biological catalysts that can help break larger molecules into smaller molecules while remaining unchanged themselves. They speed up the chemical reactions by lowering the energy of activation barrier, are specific to one molecule. The enzyme’s specificity arises from its active site, an area with a shape corresponding to the molecule with which it reacts (the substrate). The shape of the enzyme where the chemical binds only allows the binding of that particular chemical, or inhibitor substrates that are structually similar to the substrate, competing for the active site....   [tags: GCSE Chemistry Coursework Investigation] 1492 words
(4.3 pages)
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Effect of Temperature on Rate of Reaction - Effect of Temperature on Rate of Reaction The enzyme amylase digests starch to form sugar.Amylase is released in the mouth and carries out the reaction at body temperature 37 degrees centigrade.I will investigate the effects of temperatures higher and lower than room temperature on the rate of this reaction. Prediction I think that the reaction will be fastest at 50 degrees centigrade ,because at body temperature reactions are carried out quickly but at a higher temperaturem the enzyme and sugar particles will move faster due to a larger amount...   [tags: Papers] 622 words
(1.8 pages)
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Investigation of the Rate of Reaction - Investigation of the Rate of Reaction Concentration: If the concentration of a solution is increased there are more reactant particles per unit volume. This increases the probability of reactant particles colliding with each other. Pressure: If the pressure is increased the particles in the gas are pushed closer. This increases the concentration and thus the rate of reaction. Surface Area: If a solid is powdered then there is a greater surface area available for a reaction, compared to the same mass of unpowdered solid....   [tags: Papers] 676 words
(1.9 pages)
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Testing the Rate of Reaction for Catalysts - Testing the Rate of Reaction for Catalysts Introduction Enzymes are produced in cells. They are proteins that act as catalysts. Catalysts are chemical substances that speed up reactions but do not get used up during the reaction. A single enzyme can be used as many times over. An example of how an enzyme molecule might join two other molecules together and form a more complicated substance is shown below. Reactions in which large molecules are created from small molecules are called anabolic reactions....   [tags: Papers] 1094 words
(3.1 pages)
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Rate of Reaction with Sodium Thiosulphate - Rate of Reaction with Sodium Thiosulphate COLLISION THEORY The Collision theory of Reaction Rates is said by some to be one of the most stable in the Physical Sciences. The theory states that in order for a successful reaction to take place there must be 'effective' collisions between the reactant molecules. Simply having reactant molecules colliding is necessary but not sufficient in itself. The collisions have to be effective. Collision theory explains this reaction, in a concentrated solution there are more of the reacting particles present, this means that there is a greater chance of collision therefore a greater chance of reactions....   [tags: Papers] 1284 words
(3.7 pages)
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Plan for Rate of Reaction for Halogenoalkanes - Plan for Rate of Reaction for Halogenoalkanes Aim === Aim of the experiment is to find out and compare the rate of displacement of the halide ion and how is varies with respect to the carbon halogen bond. This will occur through a nucleophilic attack. General equation: general formula: R-X +: Nu- ® R-Nu + X- CnH2n+1X (where X is the halogen) Background information halogenoalkanes ====================================== In the reaction of halogenoalkanes bond polarity show us that C-F would be the most reactive then C-CL, C-Br and C-I would be the lest reactive....   [tags: Papers] 1057 words
(3 pages)
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Temperature's Effect on Rate of Reaction - Temperature's Effect on Rate of Reaction Planning The Equation being used is: -CaCo3 + HCL → CaCl2+H2O + CO2 CaCo3 =Marble Chips. HCL =Hydrochloric Acid. CO2 =How much gas is given off. My prediction is that if you change the temperature it will make the reaction happen faster because I will be using the Collision Theory as background information. When you heat up the particles you are giving them kinetic energy, so heating the chemicals results in the particles moving faster....   [tags: Papers] 1227 words
(3.5 pages)
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Rate of Reaction and Temperature Experiment - Rate of Reaction and Temperature Experiment Temperature (oC) 30.0 40.0 50.0 60.0 70.0 Time (s) 30.0 60.0 30.0 60.0 30.0 60.0 30.0 60.0 30.0 60.0 Repeat 1 O2 collected (cm3) 4.0 6.0 11.0 11.0 12.0 12.0 7.0 7.0 6.0 6.0 Repeat 2 O2 collected (cm3) 4.5 5.0 12.0 12.5 12.5 12.5 8.0 8.5 7.0 7.0 Repeat 3 O2 collected (cm3) 5.0 6.0 11.5 11.5 12.0 12.0 7.5 8.0 6.5 6.5 Average (cm3) 4.5 5.7 11.7 11.7 12.2 12.2 7.5 7.8 6.5 6.5 Table to show the amo...   [tags: Papers] 1236 words
(3.5 pages)
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Investigation of Rate of Reaction - Investigation of Rate of Reaction INTRODUCTION ------------ I will be conducting an experiment on the rate of reaction for my GCSE coursework. . We will be reacting sodium thiosulphate with hydrochloric acid. I will be investigating the effects had on rate of reaction. When sodium thiosulphate and hydrochloric are mixed, a yellow precept of sulphur is produced. The solution becomes increasingly difficult to see through as more and more sulphur is formed. WHAT IS RATE OF REACTION....   [tags: Papers] 1649 words
(4.7 pages)
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Investigating The Rate Of Reaction - Investigating The Rate Of Reaction Aim: The aim will be to find out how the changing of concentration of a solution will alter the rate of reaction. Theory: My own experiences of rate of reaction would probably be a rusting iron ,a bomb going off, the firing of a bullet and charging the battery of a mobile phone. Chemical reactions occur when the molecules of 2 or more elements or compounds, called the reactants, collide and recombine to form a new compound, which is called the product....   [tags: Papers] 941 words
(2.7 pages)
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Rate of Reaction Using Enzymes - Rate of Reaction Using Enzymes In this bit of coursework I will be investigating the rate of reaction in which enzymes are the catalyst breaking down a substrate. The substrate I am going to use is Hydrogen Peroxide (H2O2, water with another Oxygen), this molecule usually breaks down on its own accord, but also the rate of decomposition can be increased with the use of a catalyst; in this case the catalyst is a biological one called an enzyme. Hydrogen Peroxide slowly breaks down on its own accord into water (H2O) and oxygen (O2): 2 H2O2 à 2H2O + O2 Hydrogen Peroxide à Water + Oxygen In my experiment, I want to investigate the rate of reaction with an...   [tags: Papers] 2254 words
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Rate of Reaction Coursework - Rates of Reaction A chemical reaction can only occur between particles when they collide (hit each other). Particles may be atoms, ions or molecules. There is a minimum amount of energy which colliding particles need in order to react with each other. If the colliding particles have less than this minimum energy then they just bounce off each other and no reaction occurs. This minimum energy is called the activation energy. The faster the particles are going, the more energy they have. Fast moving particles are more likely to react when they collide....   [tags: GCSE Chemistry Coursework Investigation] 589 words
(1.7 pages)
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Rate of Reaction Investigation - Rate of Reaction Investigation Aim: To investigate the effect of concentration upon the rate of reaction between Sodium thiosulphate (Na²S²O³) and dilute Hydrochloric acid (HCl). This is: Na²S²O³ + HCl 2NaCl + H²O + SO² + S This experiment will be done in two parts. Firstly the experiment will be done with the volume of HCl and total volume constant, and changing the Thiosulphate and water volumes, thereby changing the concentration of the thiosulphate. The second part of the experiment will be keeping the thiosulphate and total volume constant and changing the HCl and water volumes....   [tags: Papers] 673 words
(1.9 pages)
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Rate of Reaction Coursework - An experiment to find the rate of reaction between two liquids Introduction This is an experiment to determine the effect of changing the concentration of sodium thiosluphate (Na S O (aq)) on the rate of reaction between sodium thiosulphate and hydrochloric acid (HCL (aq)). HCl+sodium thiosulphatearrowsodium chloride+sulphur dioxide+sulphur+water. HCl(aq) + Na2S2O3(aq) arrow NaCl(aq) + SO2(g) + S(s) + H2O(l) If one were to place hydrochloric acid and sodium thiosulphate into a beaker a white cloudy solution is left in the beaker....   [tags: GCSE Chemistry Coursework Investigation] 1573 words
(4.5 pages)
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Investigating Rate of Reaction - Investigating Rate of Reaction Aim: I will choose one factor of this reaction and record how it affects the rate of reaction. The enzyme Catalase causes the following reaction: Hydrogen peroxide [IMAGE] Water + Oxygen 2H2O(aq) [IMAGE] 2H2O(aq) + O2 (g) Background Information: Catalase is an enzyme. Most enzymes are proteins and all are catalysts. Enzymes either break molecules down or build them up. Most enzymes work at the optimum temperature of 36°C (body temperature)....   [tags: Papers] 1910 words
(5.5 pages)
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Rate of Reaction Investigation - Rate of Reaction Investigation Aim: To find out how altering the concentration of Sodium Thiosulphate affects the rate of reaction with Hydrochloric Acid. Background Information: Chemical reactions rely on molecules colliding with each other. For products to be made bonds need to be broken and then bond made. The energy needed to cause these collisions is called the activation energy. If the energy given to the reaction is too low, then it will not proceed - this is the reason why heating often increases rate of reaction (as heating increases the molecules energy)....   [tags: Papers] 916 words
(2.6 pages)
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Rate of Reaction Investigation - Rate of Reaction Investigation Aim: The aim of this experiment is to plan, carry out, analyse and evaluate an investigation into how increasing the concentration of an enzyme affects the rate of a reaction. The substrate in use will be Hydrogen Peroxide and we will be testing to find out how increasing the concentration of this will affect its reaction with the enzyme. Factors affecting the investigation: · Concentration of the substrate. The rate of reaction should increase proportionally to the concentration, as the higher the concentration, the faster the reaction should be....   [tags: Papers] 1215 words
(3.5 pages)
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Investigating Rate of Reaction - Investigating Rate of Reaction I will be studying the rate of reaction between sodium thiosulphate and dilute hydrochloric acid. I believe that if I increase the concentration of the sodium thiosulphate, the rate of reaction will increase, because the molecules are closer together, so there are more collisions per second. I believe if I double the concentration of the sodium thiosulphate then the rate of reaction will double, because there will be twice as many sodium thiosulphate molecules in the same area, and so there will be twice as many collisions....   [tags: Papers] 1031 words
(2.9 pages)
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Rate of Reaction Investigation - Rate of Reaction Investigation Aim - The aim of this experiment is to find out how different concentrations of Hydrochloric Acid and Distilled water affect the rate of reaction between Hydrochloric Acid and Magnesium. Plan Method In the reaction between hydrochloric acid and magnesium ribbon, the hydrochloric acid will dissolve the magnesium and produce hydrogen gas. In my experiment I am going to measure the amount of gas given off with different concentrations of hydrochloric acid and distilled water reacting with a 10cm length of magnesium ribbon The chemical reaction takes place when the magnesium ribbon comes into contact with the hydrochloric acid....   [tags: Papers] 1779 words
(5.1 pages)
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Rate of Reaction Investigation - Rate of Reaction Investigation 2HCL + NA²S²O³ à + 2NaCL Hydrochloric acid + Sodium thiosulphate à Sulphur + Sodium chloride + S0² + H²0 + Sulphur dioxide + Water Collision Theory For this experiment we can use the collision theory. Collision theory explains how chemical reactions occur and why rates of reaction differ. When particles collide, they may react. A reaction occurs when particle is facing in the correct direction and the collision has enough energy....   [tags: Papers] 701 words
(2 pages)
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Rate of Reaction Investigation - Rate of Reaction Investigation This investigates how the rate of a chemical reaction depends on the concentration of reactants in the solution. I am going to repeat an experiment and/or an investigation to find out how the rate of reaction varies with the concentration of acid. Word equation: The reaction that will take place is Hydrochloric acid + Calcium Carbonate CaCo3 + 2HCL CaCL2 + H2O + CO2 Prediction: I predict that the higher the concentration level, the faster the reaction will be meaning more gas will leave the reaction in a shorter space of time....   [tags: Papers] 890 words
(2.5 pages)
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Rate of Reaction Investigation - Rate of Reaction Investigation Aim To investigate how changing the concentration of a reactant (sodium thiosulphate) affects the rate of reaction, and why. Prediction I predict that increasing the concentration of the reactant will increase the rate of reaction. This is because as the concentration of the solution increases, the numbers of particles present increases, in the same volume. This means the particles are closer together and there is a greater possibility of a collision and reaction....   [tags: Papers] 744 words
(2.1 pages)
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Rate of Reaction Investigation - Rate of Reaction Investigation Aim: To determine how changing the concentration of a reactant (Na S O ) affects the rate of the reaction. Prediction: I predict that when we increase the concentration, the rate will increase; therefore there are more particles and a greater probability of a collision. If more particles are present in the same volume, they will be closer together. This means they have a higher probability of colliding and speeding up the reaction. If we double the concentration, the rate will also double....   [tags: Papers] 648 words
(1.9 pages)
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Rate of Reaction Coursework - Investigate if changing the concentration of an acid will change the rate of the reaction when marble is dissolved in hydrochloric acid. Apparatus Marble Chips Conical Flask Hydrochloric Acid Gas Syringe Delivery Tube Stop Watch Fair Test To make the experiment a fair test I will use the same amount of acid for each concentration. I will do this by using a capillary tube because they are very accurate. I will use 3g of marble in each concentration of acid. I will clean everything out before I start the next experiment with a different experiment....   [tags: GCSE Chemistry Coursework Investigation] 1252 words
(3.6 pages)
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Rate of Reaction Investigation - Rate of Reaction Investigation Plan In this experiment I will be investigating the rate of reaction and the time taken for a 1cm strip of magnesium to entirely disappear in a container of hydrochloric acid. The equation for this reaction is magnesium + hydrochloric acid or Mg(s) + 2HCL = MgCl2 (aq) + H2 (g) For experiment my input variable will be the concentration of Hydrochloric acid, so I will be using a concentration scale of 1-2 mol dm-3. My prediction is that the higher the concentration of hydrochloric acid the faster the rate of reaction will be....   [tags: Papers] 1184 words
(3.4 pages)
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The Rate Law for Chemical Reaction Among Hydrogen Peroxide, Iodide, and Acid - The Rate Law for Chemical Reaction Among Hydrogen Peroxide, Iodide, and Acid To determine the rate law for a chemical reaction among hydrogen peroxide, iodide and acid, specifically by observing how changing each of the concentrations Experiment 3 Chemical Kinetics Objectives 1. To determine the rate law for a chemical reaction among hydrogen peroxide, iodide and acid, specifically by observing how changing each of the concentrations of H2O2, and H+ affects the rate of reaction. 2. To observe the effects of temperature and catalyst on the rate of reaction....   [tags: Rate Law Chemical Reactions Science Essays] 3112 words
(8.9 pages)
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Investigating Factors that Affect the Rate of Reaction - Investigating Factors that Affect the Rate of Reaction There are certain factors which affect the rates of reaction in an experiment. These factors are: · Pressure · Temperature · Concentration * Surface area / particle size and * The addition of a catalyst The factors that I will be concentrating on are temperature, concentration and surface area / particle size. Pressure Pressure influences the rate of reaction only when the reactants are in their gas phase....   [tags: Papers] 537 words
(1.5 pages)
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The Effect of Acid Concentration on the Rate of Reaction - The Effect of Acid Concentration on the Rate of Reaction Introduction: We are going to investigate the effect of Acid Concentration on the Rate of Chemical Reaction. We are going to use the combination of Hydrochloric Acid and Calcium Carbonate as the reactants: [IMAGE][IMAGE] [IMAGE]Calcium Carbonate + Hydrochloric Acid Calcium Chloride + Water + Carbon Dioxide Prediction I predict that the greater the concentration of acid the greater the rate of chemical reaction i.e....   [tags: Papers] 3510 words
(10 pages)
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Investigate the effect of temperature on the rate of reaction - To investigate the effect of temperature on the rate of reaction Background Information: Chemical reactions take place all the time at many different rates, some are incredibly fast like an explosion-where you get no time to see what's happening or like rusting which could take years before the iron is completely rusted. The rate of reaction is extremely important because you need to know how long before the end of the session or you may not get results in time. In living organisms it's vital that all the chemical reactions take place at the rates which supply the cells with the things they need exactly when they need them....   [tags: GCSE Chemistry Coursework Investigation] 3176 words
(9.1 pages)
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Investigating the Effects of Concentration on the Rate of Reaction - Investigating the Effects of Concentration on the Rate of Reaction Chemistry Coursework Aim: To investigate the effect of concentration on the rate of reaction between magnesium and hydrochloric acid. Introduction: This investigation is done to find out the rate of reaction between the two substances. I will be changing the concentration of the hydrochloric acid and adding the same amount of magnesium to each beaker. As I change the amount of hydrochloric acid, I would be diluting water with it....   [tags: Papers] 1024 words
(2.9 pages)
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The relationship between the concentration of Sodium Thiosulphate and the reaction rate with Hydrochloric acid - The relationship between the concentration of Sodium Thiosulphate and the reaction rate with Hydrochloric acid Introduction The rate of reaction is measured by finding the quantity of product made in a certain time. The rate of reaction can be made faster by an increase of temperature, adding a catalyst, increasing concentration or pressure or making the reactants surface area larger. An increase in temperature causes the particles of the reactants to gain more energy and move faster. Collision theory states that this results in more collisions and more of these collisions will have enough energy to cause a reaction....   [tags: GCSE Chemistry Coursework Investigation] 1609 words
(4.6 pages)
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Investigating Factors that Alter the Rate of Reaction - Investigating Factors that Alter the Rate of Reaction Aim, To investigate the factors which alter the rate of the reaction. Planning, In our experiment we will measure the rate of reaction by taking the weight of the solution every ten seconds. This may be altered as we finalise our plans. This method will give us lots of results; this will keep the accuracy of the investigation. We would like to repeat the experiment, this time measuring the rate by measuring the volume of gas given off during a period of time....   [tags: Papers] 931 words
(2.7 pages)
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Investigating the Effect of Concentration on Rate of Reaction - Investigating the Effect of Concentration on Rate of Reaction Aim The investigation is about the effect of concentration on the rate of chemical reaction. In this experiment I am going to investigate the rate of reaction of sodium litho sulphate with hydrochloric acid. The reaction that I will use is: Sodium litho sulphate + Hydrochloric Acid Na2S2O3 + 2HCl Variables ========= I will change the concentration of hydrochloric acid each time. I will use hydrochloric acid 0.1M, 0.25M, 0.50M, 0.75M and 1M....   [tags: Papers] 1110 words
(3.2 pages)
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Effect of Temperature on Rate of Reaction of Catalase - Effect of Temperature on Rate of Reaction of Catalase Introduction This investigation was in an attempt to try to find out how varying the temperature can affect an enzyme. The enzyme used was catalase which breaks down Hydrogen Peroxide, this gives off water and oxygen as effervescence. This effervescence is what is used to measure the reaction rate of the catalase. The optimal heat for enzyme activity is proven to be 37oC as anything above this denatures the enzyme. Denaturing is where the heat energy of breaks down the di-sulphide, ionic and hydrogen bonds that hold the tertiary structure together, this in turn changes the shape of the active site and so halts...   [tags: Papers] 582 words
(1.7 pages)
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The Effect of Temperature on the Rate of Reaction of Yeast - The Effect of Temperature on the Rate of Reaction of Yeast Aim My aim is to view the effects of different temperatures on the rate of respiration of yeast in a glucose solution. I will do this by measuring the rate of which carbon dioxide is given off (CO2) by the yeast. Scientific knowledge ==================== From previous experiments I have learnt several things about yeast and enzymes. I have learnt that an enzyme is a natural catalyst, (something that speeds up the experiment without altering the out come.) Yeast is a fungus that is used in fermentation this is because it respires anaerobically and aerobically, the anaerobic respiration is the use...   [tags: Papers] 1309 words
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Investigating Factors that Affect the Rate of Reaction - Investigating Factors that Affect the Rate of Reaction 1.0 Introduction The rate of a reaction is a measure of how quickly reactants are used up or products are made. There are many factors which will affect the rate of reaction between 2 reactants. These are: surface area of the potato chip, temperature of the liquid, catalyst, light, physical stirring and concentration of liquid. In this experiment I shall look at the effect of concentration on the rate of reaction between hydrogen peroxide (H2O2) and a catalyst- catalase, which is found in potato chips....   [tags: Papers] 1263 words
(3.6 pages)
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The Effect of the Concentration of Acid on the Rate of Reaction - The Effect of the Concentration of Acid on the Rate of Reaction Aim: To find out how the concentration of an acid affects the rate of reaction. I am reacting different concentrations of HCL acid with the same concentration of sodium thiosulphate. I predict the HCL acid which is 2m, will react faster with the sodium thiosulphate. I know this because of concentration, all the particles have kinetic energy and in order for a chemical reaction to occur, particles in a solution need to collide into one another with sufficient force and energy....   [tags: Papers] 684 words
(2 pages)
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The Effect of Acid on the Rate of Reaction with Magnesium - The Effect of Acid on the Rate of Reaction with Magnesium Aim: To find out how the concentration of hydrochloric acid affects the rate of reaction with magnesium ribbon. Hypothesis: I think that the lower the concentration of Hydrochloric acid, the slower the rate of reaction with Magnesium ribbon. The reason why is because there are less particles in the same volume so less collisions are possible every second, therefore less effective collisions will occur. Preliminary work: I did an experiment before to find out how the concentration of hydrochloric acid affects the rate of reaction with Sodium Thiosulphate....   [tags: Papers] 790 words
(2.3 pages)
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Quantity of Enzymes and the Rate of Reaction with the Substrate - Is there a relationship between the quantity of enzymes and the rate of reaction with the substrate. Hypothesis Using my scientific knowledge my hypothesis is that as the quantity of enzymes increases so will the rate of reaction. Reasons for this hypothesis I am basing my hypothesis on a hypothesis known as the ‘lock and key hypothesis.’ It explains that when an enzyme substrate complex forms by means of a spontaneous reaction the substrate fits into the active site like a key fits a lock. It is known as a spontaneous reaction not because it happens spontaneously but because it requires initial energy in order for the reaction to take place and the products have less energy than the reac...   [tags: essays research papers] 2466 words
(7 pages)
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Investigating Factors that Affect the Rate of a Reaction - Investigating Factors that Affect the Rate of a Reaction Aim === To investigate the rate of reaction when you combine the chemicals sodium thiosulphate and hydrochloric acid at different temperatures. Prediction ========== My hypothesis is that the higher the temperature the lower the amount of time taken for the reaction to take place and therefore the lower the temperature the longer the time will take for the reaction to take place. The reason that I think this is because I know that the higher the temperature the faster the particles will move....   [tags: Papers] 967 words
(2.8 pages)
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Investigating The Affect of Concentration on The Rate of Reaction - Investigating The Affect of Concentration on The Rate of Reaction Aim- To find out if changing the concentration of the hydrochloric acid affects the volume of gas released in 5 minutes. Background Information The rate of reaction depends on four things:- 1. Temperature 2. Concentration 3. Catalyst 4. Size of particles/surface area The Collision Theory The collision theory explains the rates of reaction, the rate of reaction depends on how often and how hard the reacting particles collide with each other....   [tags: GCSE Chemistry Coursework Investigation] 2090 words
(6 pages)
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