Heart Rate Investigation Aim: To discover if there is any link between the amount of exercise taken to the rise of a persons heart rate. Prediction: I predict that as the amount of time you exercise goes up so will your heart rate. But after a certain amount of time your heart rates rate of increase will slow down and eventually level out and stay the same, until you slow down or stop exercising. This is because the more you exercise the more energy your body will need. Oxygen
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
Rates Of Reaction Investigation Plan: This experiment is planned to investigate the rate of reaction when mixing Copper sulphate (CuSO4) with Zinc powder (Zn). My plan is to see what happens before, during and after the reaction takes place. I will need the following equipment to carry out this investigation: Ø A 50ml marked measuring tube Ø A digital precision scale Ø 600ml of copper sulphate Ø A digital thermometer Ø A pot of Zinc powder Ø A sandpaper (to sand the Copper
Rates of Reaction Investigation Reactions happen when the reactant particles collide and turn into a product. Sodium and chlorine, when reacted, they give us a compound Sodium Chloride (salt). Chemical reactions can be very difficult to undo. When metal rust this is a slow reaction, however burning, this is very quick. A speed on which the reaction takes place is called and rate of reaction. There are many ways on which to speed up the reaction. The most common is to speed up the collision
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
An Investigation of Factors Affecting the Rate of Osmosis Introduction Osmosis is the movement of water molecules across a semi permeable membrane from a region of high water concentration to a region of low water concentration. [IMAGE] A semi permeable membrane is a membrane with very small holes in it; they are so small that only water molecules can pass through them. Bigger molecules such as glucose cannot pass through it. In actual fact water molecules pass both ways through
Investigation in to the factors that affects the rate of fermentation of Glucose Aim: To investigate the factors that affects the rate of fermentation of Glucose. Background knowledge. ENZYMES Fermentation is a form of an anaerobic respiration where by glucose is partially broken down so only a small amount of energy is released. The yeast cells use the enzymes, ZYMASE to break down sugars unable to obtain. GLUCOSE CARBON DIOXIDE + ETHANOL(+ENERGY) C6 H12 O6 6CO2 + C2H5OH (210KJ) Enzymes
Investigation: How does the concentration of acid affect the rate of reaction? The aim of this investigation is to test how concentration affects the rate of reaction. My prediction for my investigation is that the higher the concentration, the faster the reaction will be. My reason behind my prediction is: · The higher the concentration, the more particles there are which will collide with enough energy to overcome activation energy, which is explained as the collision theory. Collision theory
Investigation of How the Concentration of Catalase Enzyme Affects the Rate of Reaction Aim: To find out how the concentration of Catalase Enzyme will affect the enzyme activity and the rate of reaction towards Hydrogen Peroxide. (H O ) Prediction: I predict that with the higher concentration of enzyme, the likelihood of it breaking down molecules will be greater because there will be more enzymes to work at the substrate and the chances of it colliding will be higher making the activity
An Investigation on the Rate of Reaction between Sodium Thiosulphate and Hydrochloric Acid Chemical Background When sodium thiosulphate is mixed with dilute hydrochloric acid it makes a cloudy liquid of sodium chloride, water, sulphur (this makes the liquid cloudy), and it gives of the gas sulphur dioxide. A precipitate of sulphur is made. Sodium + hydrochloric = sodium + water + sulphur + sulphur Thiosulphate acid chloride
An Investigation into the Effect of Light Intensity on the Rate of Photosynthesis on a Piece of Elodea Plan: Method: 1) First I will put some water into a boiling tube and add 5 spatulas of Sodium Hydrogen Carbonate. I will add 5 spatulas of Sodium Hydrogen Carbonate as it reacts with water and forms carbon dioxide; also I have so much so that I have carbon dioxide in excess. 2) Then I will cut off 5cm of elodea and place it into the boiling tube. 3) Thirdly I will place the boiling
Investigation of How Temperature Affects the Rate of Reaction of Sodium Thiosulphate and Hydrochloric Acid I am going to investigate how temperature affects the rate of the reaction of sodium thiosulphate and hydrochloric acid. WORD EQUATION Sodium thiosulphate + Hydrochloric acid [IMAGE] Sodium chloride (salt) + Sulphur + Water + Sulphur dioxide CHEMICAL EQUATION Na2S2O3 + 2HCl [IMAGE] 2NaCl + S + H2O + SO2 The temperature
Analysis As seen in the processed data table, as the intensity of the exercise increases, so does the participant’s heart rate. The graph also supports this by demonstrating that the two variables have a close positive and linear relationship. The data points are close to the trendline which has a positive gradient of 0.3839. The r2 value of 0.9791 is very close to 1, meaning that it has a strong positive relationship. The value also shows that the two variables have a positive correlation in which
Investigation to find out if changes in concentration of acid affect the rate of a chemical reaction PLANNING – Title – Investigation to find out if changes in concentration of acid affect the rate of a chemical reaction. Introduction – The rate of reaction can be defined as the speed at which a reaction takes place. The rate of reaction tells us how quickly a chemical reaction has happened. There are many things that can affect the rate of reaction, (some of these are shown in figure 1 below
An Investigation to see How the Concentration of Hydrochloric acid affects the Rate of Reaction with Calcium Carbonate I am going to investigate how concentration of hydrochloric acid affects the rate of reaction between hydrochloric acid and indigestion tablets which contain mainly calcium carbonate. From my background knowledge from class work and books, (see references) I have found out that if you increase the concentration of hydrochloric acid, the rate of reaction will increase and
Investigation Into the Effect of Temperature On the Rate of Respiration of Yeast Preliminary Work For my preliminary work, I am working with 35ml of yeast. I think that this is the best volume to use as it is about ¾ of a test tube full, and it allows for the yeasts expansion when heated. I am trying to find out the best range of temperatures to be used in finding out the respiration of the yeast, and I am also trying to find an equilibration time that can be used in the main experiment
Investigation of the Effect of Temperature on the Rate of a Lipase Reaction I am going to look at the effect of temperature on the rate of a Lipase Reaction, and to look at this I will be changing the temperature variable. In order to measure this, I will be doing the following practical: 1) Add 5cm³ of milk and 1cm³ of Lipase solution at different temperatures. 2) Then I will measure the reaction every 30 seconds, from 30 seconds to 2 minutes with a pH probe (as lipase breaks down
Investigation of Factors that Affect the Rate of Reaction Between Limestone PLANNING SECTION Aim: To investigate the factors that affect the rate of reaction between limestone and hydrochloric acid. Introduction: Text Box: CaCO3 + HCl = CaCl2 + CO2 + H2O calcium carbonate + hydrochloric acid = calcium chloride + carbon dioxide + water In this investigation I am trying to find out what influences the reaction rate between limestone and hydrochloric acid. The reaction is: The
parents and concluded that the case for transmission across generations has been overstated. Looking back on past investigations gives support for intergenerational transmission, almost without exception. These investigations identify maltreating parents and then interview them about their own childhood. Investigations done with and without control groups indicate abusing parents report high rates of having been abused physically during childhood (Steele and Pollock 1974; Horowitz and Wollock 1981; Oliver
Investigation to Determine the Relationship Between Surface Area and Rate of Oxygen Production To determine the relationship between surface area and rate of oxygen production when a potato is placed in hydrogen peroxide (H2O2) solution. Background Information ---------------------- Potato contains enzymes such as catalase. Catalase are protein molecules, which are found in animal and plant cells. Catalase speeds up specific reactions in the cells. They all have very specific duty