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Laws of Conservation of Mass and Energy - Introduction In any science that requires computation, specifically in Chemistry, gathering measurements of various physical and chemical properties need to be strictly accurate and precise for it is in this most crucial phase that either make or brake the quality and value of science. No matter how good one may perform the experiment, without forethought on how to gather data correctly, the collected information would not be reliable enough to draw out a conclusion on it. The main objective of this experiment is to explain thoroughly the reacting system which can be done through scientific observation because it is through this vital step that the facts needed to elucidate the reacting system are obtained....   [tags: Chemistry] 1224 words
(3.5 pages)
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Thi Chimocel Dynemocs uf Cedmoam on thi Suol Envorunmint - ... As Cd os e tuxoc mitel tu hamens [3] end enomels eloki, thi invorunmintel end suol cuntemonetoun woth Cd os bicumong uf griet cuncirn on thi lest fiw dicedis. Thirifuri, ot os ompurtent fur chimosts, invorunmintel scointosts end ingoniirs tu andirstend thi chimostry uf Cd ontirectouns on suols tu andirstend ots boueveoleboloty. Mollouns uf tunnis uf hezerduas westi cunteonong CD eri giniretid on thi wurld un yierly besos. Biceasi uf thi oniffocoint westi hendlong tichnoqais end hezerduas westi liekegi on thi pest, thuasends uf sotis, ispicoelly on ondastroel wurld wiri cuntemonetid by hievy mitels, urgenoc cumpuands end uthir hezerduas metiroels....   [tags: Chemistry] 979 words
(2.8 pages)
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Thi Afficts uf Doffirint Yiest un thi Reti uf Firmintetoun - ... Thos os thirifuri en eneiruboc pruciss. Thos os thi fonel stegi end thos os whiri thi fonel cunvirsoun uf fractusi end glacusi ontu ithenul end ompruvimints tu thi erumes end fonel flevuars uf thi woni eri prudacid. (WoniDifontouns Steff Wrotir) Thiri os elsu e thord pruciss uf firmintetoun knuwn es melulectoc firmintetoun. Thos cen uccar netarelly on thi woni of thiri os wold yiest rimeonong bat os uftin incuaregid by wonimekirs by eddong on bectiroe tu ceasi thos pruciss tu uccar. In melulectoc firmintetoun, meloc ecod os cunvirtid ontu lectoc ecod by e netarelly uccarrong pruciss on whoch bectiroe fiids un thi meloc ecod....   [tags: Chemistry ] 1156 words
(3.3 pages)
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Enemonuni Dirovetovis - ... Thi NMR spictre wiri ricurdid un e Veroen Mircary VXR-300 NMR spictrumitir.1H NMR (300 MHz) end 13C NMR (75.46 MHz) wiri ran on diatiretid chlurufurm (CDCl3) ur domithylsalphuxodi (DMSO-d6). Chimocel shofts wiri riletid tu thet uf thi sulvint. Mess Spictre wiri ricurdid un e Shomedza GCMS-QP1000 EX mess spictrumitir et 70 iV. Elimintel enelysis wiri cerroid uat et thi Mocruenelytocel Cintri uf Ceoru Unovirsoty, Goze, Egypt. All riectouns wiri fulluwid by TLC (Soloce gil, Alamonam Shiits 60 F254, Mirck)....   [tags: Chemistry ] 2461 words
(7 pages)
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Sucoel Rilivenci Ripurt: Ceffioni - ... 2.2 Physocel Prupirtois uf Ceffioni Pari ceffioni os uduarliss, whoti on culuar, luuks loki fliicy messis, glostinong niidlis ur puwdir end hes e bottir testi. Tebli 1.1 Physocel prupirtois uf ceffioni Physocel prupirty Velais/ Miesarimints Buolong puont 178 °C (sablomis) Miltong puont 238 °C Dinsoty 1.2 g/cm³ Vuletoloty 0.5% Vepuar prissari 101 kPe et 178 °C pH velai 6.9 (1% sulatoun) Sulaboloty on wetir 2.17% Vepuar dinsoty 6.7 g/m³ Mulicaler wioght 194.19 g/mul (PERGAMON PRESS, 1996) 2.3 Huw Ceffioni Wurks on thi Hamen Budy Ceffioni os biloivid tu ect un thi breon end uthir urgens by bluckong edinusoni ricipturs (thiriby bluckong e pethwey thet lieds tu thi briekduwn uf cycloc edinusoni munuphuspheti, cAMP)....   [tags: Chemistry]
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1779 words
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phesi doegrem - ... Huwivir, thi timpiretari prubi nutocis thi forst chengis on timpiretari, end frum thi dete puonts cullictid uni cen ditirmoni whin thi slupi uf thi greph sterts tu pleni, end thirifuri ditirmoni whin crystellozetoun uccars. Farthirmuri, thi oci wetir beth hed e tindincy tu ceasi sumi cundinsetoun un thi uatsodi uf thi biekir, whoch et tomis medi ot doffocalt tu sii whet wes heppinong on thi tist tabi cunteonong thi sulatoun. Crystellozetoun sterts nier thi wells, end un thi sarfeci uf thi sulatoun mekong ot ompussobli tu sii of thiri os muri then uni sit uf crystellozetoun timpiretaris fur e moxtari....   [tags: Chemistry]
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2006 words
(5.7 pages)
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Sodium (Na) - Sodium (Na) Sodium has an atomic number of 11 and a mass of about 23g. It is a silvery white-metallic element classified under the alkali metals. Sodium has been known since early times and was used by the people of Mesopotamia and Egypt to make glasses. Sodium is the sixth most common element found on the earth. It is usually not found in nature but more often in compounds such as salt (NaCl). Sodium conducts heat and electricity easily. Without this element life could not exist. Each compound is used for a certain reason....   [tags: Science Chemistry] 732 words
(2.1 pages)
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Magnetic Fluids - 1.1 PRELUDE: The phenomenon of ferromagnetism is associated only with the solid state of matter; like iron, nickel, cobalt and some rare earth metals and their alloys. Thus, up to now, there is no intrinsic homogeneous fluid having ferromagnetic properties; although, theories admit the possibility of ferromagnetism in the liquid state, and suggest that there is no inherent reason why they should not exist [1-3,5]. Ferromagnetism occurs when paramagnetic ions in a solid lock together in such a way that their spins all point (on the average) in the same direction ....   [tags: GCSE Chemistry] 1353 words
(3.9 pages)
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Thi Chimocel Wiepunry Utolosid In Wurld Wer Oni end thior Efficts un Mudirn Ethocs end Murels - ... Buth thi Frinch end thi Girmen hed crietovi weys tu edmonostir thos ges. Thi Frinch asid thi grinedi, en elriedy pruvin end trastwurthy wiepun, whoch wes ixtrimily iffictovi on riliesong thi ges. Thi Girmen ermy tuuk edventegi uf ots gesiuas steti es will, end asid fregmintetoun shills egeonst thi Brotosh thet elsu saccissfally doffasid thi ges. Thi asi uf thos ges egeonst iech uthir risaltid on en ixtrimily cuntruvirsoel dibeti es tu whithir ot briechid thi Hegai Triety uf 1899, e triety thet bennid thi leanchong uf prujictolis cunteonong esphyxoetong ges ur puosunuas ges....   [tags: War, Chemistry]
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1563 words
(4.5 pages)
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The Applications and Making of Artificial Diamonds - The Applications and Making of Artificial Diamonds Diamonds are very unique. Their hardness and beauty have enticed people for many years. Now some of the same attributes that make them appealing also make them useful. To understand these attributes the chemistry of carbon is very important. This unique chemistry is what makes them so hard to make. Much research has gone into the making of diamonds and this has led to many successes in the field. These discoveries have led to machines and processes that make diamond making more efficient and reliable....   [tags: Diamond Diamonds Chemistry Essays]
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1578 words
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Investigation to find the effect of concentration on the rate of reaction - Investigation to find the effect of concentration on the rate of reaction Aim --- I am going to investigate the effect of concentration on rate of reaction in the reaction between Sodium Thiosulphate and Hydrochloric Acid: 2HCl + Na2S2O3 à 2NaCl + SO2 + S + H2O Prediction I predict that that the greater the concentration of Sodium Thiosulphate or Hydrochloric Acid, the faster the rate of reaction. I think this because of the collision theory: Increased concentration = Increased number of molecules = number of collisions and, therefore, the rate of reaction....   [tags: GCSE Chemistry Coursework Investigation] 1596 words
(4.6 pages)
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Primo Levi’s The Periodic Table - Primo Levi’s The Periodic Table Primo Levi’s personal relationship to his profession as a chemist shows that philosophically and psychologically, he is deeply invested in it. His book THe PeriOdic TaBLe shows that his methodology cannot be classified as either purely objective or purely subjective. He fits into the definition of dynamic objectivity given by Evelyn Fox Keller in her book Reflections on Gender and Science. Primo Levi’s methodology cannot be called purely objective. Being purely objective would mean being not influenced by personal beliefs or feelings....   [tags: Chemisty Chemistry Science Essays]
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1135 words
(3.2 pages)
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Lithium and Bipolar Disorder - Lithium and Bipolar Disorder INTRODUCTION The drug lithium has been used for a variety of disorders such as gout, diabetes, and epilepsy for over 100 years. It was not until 1949 when John Cade discovered that lithium had a calming effect on guinea pigs that the possibilities of it being used for mania were explored (Paykel, 1992). Since then, lithium has been established as one of the primary treatments for manic depression disorder. In the body of this paper we will explore the chemistry of lithium, the synaptic transmitters involved, the parts of the neuron affected, the inhibitory and excitatory potential changes, the ion channels effected, the physiological changes, the primary behavior changes, the side effect behavior changes and the effects reported by users....   [tags: Chemistry Chemical Essays]
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1894 words
(5.4 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 effect of temperature on the rate of reaction between sodiumthiosulphate and hydrochloric acid - Investigating the effect of temperature on the rate of reaction between sodiumthiosulphate and hydrochloric acid Planning My coursework for G.C.S.E Chemistry will be based on the rate of reaction. I will be investigating the effect of temperature on the rate of reaction and will analyze the reaction between sodium thiosulphate and hydrochloric acid at different temperatures to see the effect of heat. I will be reacting sodium thiosulphate with hydrochloric acid at different temperatures. I will place 50cm3 of sodium thiosulphate and 5cm3 of hydrochloric acid in one conical flask....   [tags: GCSE Chemistry Coursework Investigation] 460 words
(1.3 pages)
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The Uses of Salt - The Uses of Salt Mineral halite, best known as common salt, has been one of the most abundant and used minerals over the centuries. It is essential for the human diet and is an important commercial chemical. Pure salt consists of two elements, which are sodium and chlorine [chloride]. Its chemical name is sodium chloride (NaCl). “In chemistry, common salt is one of a large number of electrolytic compounds classified as salts. The compound occurs as a mineral in the form of crystals and the forms of the crystals are generally cubic and are transparent.” (Encyclopedia Americana 163) Halite (sodium chloride) comes from the Greek “halos”, meaning salt and “lithos” meaning rock, and is better known as “rock salt”....   [tags: Chemistry Salts Essays]
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610 words
(1.7 pages)
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The K+ Channel Revisited - The K+ Channel Revisited Many scientists enter the field of neuroscience with a desire to understand how the human brain functions to create our actions. Some take a large approach and study reactions to stimulus in live animals. This approach leaves us still wanting to know about things that aren't a result of an outside stimulus. Other scientists take the minimalist approach and start by studying the exact mechanisms of individual cells of the brain. But, what good does that do us for everyday life....   [tags: Chemical Neuroscience Chemistry Papers]
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1870 words
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Psilocybin and Body Changes - Psilocybin and Body Changes Physiological (Whole Body) Changes Psilocybin, the active psychotomimetic, hallucinogenic chemical found in the psilocybe genus of mushrooms, is absorbed through the mouth and stomach and is a monoamine-related substance (Levitt 1975, Grilly, 1998). This means that psilocybin's biochemical effects are mediated by changes in the activity of serotonin, dopamine, and norepinephrine in the central nervous system (made up of the brain and the spinal cord) primarily by way of 5HT2a receptors (Grilly 1998, Hasler 2003)....   [tags: Chemistry Chemical Drugs Papers]
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1772 words
(5.1 pages)
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Caffeine - Caffeine Caffeine is the most-widely consumed psychoactive substance by human beings throughout the world (Reid, 2005). This report will detail its natural origins, chemical structure (as well as those of similar substances), and the methods and dosages in which it is rendered into its usable form. Additionally, this report will detail caffeine's various biological pathways within the human body, including access to the brain and various neurotransmitter pathways. Caffeine is a chemical that occurs naturally in over 100 plant species throughout the world (Steffen, 2000)....   [tags: Science Essays Scientific Chemistry] 2039 words
(5.8 pages)
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An Investigation into the Enthalpies of the Combustion of Alcohols - An Investigation into the Enthalpies of the Combustion of Alcohols ================================================================== Planning My aim for this experiment is to see the energy produced from different alcohols. This investigation involves burning alcohol in the air. ‘GCSE Chemistry’ by B.Earl and L.D.R Wilford says that "alcohols form, another homologous series, with the general formula Cn H2n+1OH ". The alcohol reacts with the oxygen in the air to form the products water and carbon dioxide....   [tags: GCSE Chemistry Coursework Investigation] 3784 words
(10.8 pages)
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The electrolysis of copper sulphate solution and copper electrodes - The electrolysis of copper sulphate solution and copper electrodes Introduction: For my GCSE Chemistry assessment I will be investigating the electrolysis of copper sulphate solution with the copper (ii) plates. Aim: My intention for this observation is to find out how the current has an effect on the mass of copper deposited in the electrolysis of copper sulphate and copper (ii) plates. Safety Precautions: In this investigation I will make sure that everything is as safe as possible and that there are no chances of accidents occurring....   [tags: GCSE Chemistry Coursework Investigation] 1255 words
(3.6 pages)
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Comparing the Enthalpy Changes of Combustion of Different Alcohols - Comparing the enthalpy changes of combustion of different alcohols Planning What are alcohols. ================== Alcohol is the common family name for the hydrocarbon group alkanols. They are part of a homologous series. At least one of the hydrogen groups in the molecule is replaced by an OH group. GRAPH Propane Propan-2-ol They are all organic compounds. The general formulas for the alcohols are: CnH(2n+1)OH Where n represents a number. The first and simplest member of the alkanols family is methanol....   [tags: GCSE Chemistry Coursework Investigation]
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An investigation of neutralization reactions - An investigation of neutralization reactions Aim Question : What is the effect of changing the concentration of an alkali, on the volume of acid needed to neutralise it, when acid is added to it. The plan is to use two acids (Hydrochloric & Sulphuric) and one alkali (Sodium Hydroxide). The reason I need to use two acids is; because the question applies to all acids and alkalis and to just use one of each would not enable me to come to a general conclusion. If there had been more time available, ideally I would have preferred to use two alkalis as well as two acids....   [tags: GCSE Chemistry Coursework Investigation]
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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 to work there must be hard collisions between the zinc and the hydrogen ions (acidity ion) from the acid, The faster the harder and the more often the collisions happen so I predict the more catalyst the faster the reaction....   [tags: GCSE Chemistry Coursework Investigation] 1447 words
(4.1 pages)
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Factors Affecting the Decomposition of Marble Buildings by Acid Rain - Factors Affecting the Decomposition of Marble Buildings by Acid Rain Background Acid Rain: Nitrogen acids and sulphur dioxides come out of tall chimneys and vehicles. These go into the air, and air currents carry the gases away, and they react with water vapour and oxygen. This produces H2SO4 (sulphuric acid) and HNO3 (nitric acid). The acids become part of a cloud, and it falls down to earth, as acid rain or snow. This can end up miles away from the original source. The acid rain removes nutrients from soil, so plants can not get to them, so this eventually kills surrounding die....   [tags: GCSE Chemistry Coursework Investigation] 1583 words
(4.5 pages)
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How concentration affects the rate of reaction between Hydrochloric Acid and Sodium Thiosulphate - How concentration affects the rate of reaction between Hydrochloric Acid and Sodium Thiosulphate Chemistry Coursework How Concentration Affects a Reaction Aim: The aim of this experiment is to find out how concentration affects the rate of reaction between Hydrochloric Acid and Sodium Thiosulphate. Introduction: This experiment will be carried out by drawing a cross on a piece of paper and mixing hydrochloric acid and sodium thiosulphate together to see if the cross disappears. The concentration of hydrochloric acid would change every reaction to show that concentration effects a reaction....   [tags: GCSE Chemistry Coursework Investigation] 1294 words
(3.7 pages)
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Carbon Dioxide produced by Reaction between Hydrochloric Acid and Calcium Carbonate - Investigate the effect of changing the concentration of hydrochloric acid and the volume of carbon dioxide produced by a reaction between hydrochloric acid and marble chips (calcium carbonate). Chemistry Coursework To investigate the effect of changing the concentration of hydrochloric acid and the volume of carbon dioxide produced by a reaction between hydrochloric acid and marble chips (calcium carbonate) Planning experimental procedures Aim In this coursework I will be investigating to see how the concentration of acid affects the rate of reaction with marble chips....   [tags: GCSE Chemistry Coursework Investigation]
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2527 words
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Investigating how the concentration of reactants affects the rate of reaction - Investigating how the concentration of reactants affects the rate of reaction Chemistry Coursework This experiment is aimed at investigating how the concentration of reactants affects the rate of reaction: The reaction between hydrochloric acid and magnesium will be used to investigate how different concentrations of the acid affect the rate of reaction. The gas produced from the reaction will be measured and used to display the average rate of reaction. The rate of reaction is a measure of how fast a reaction is going and how long it takes to complete....   [tags: GCSE Chemistry Coursework Investigation] 1990 words
(5.7 pages)
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Investigation to find out if changes in concentration of acid affect the rate of a chemical reaction - 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.) In this coursework I am going to investigate what effect the change in acid concentration has on a chemical reaction....   [tags: GCSE Chemistry Coursework Investigation] 2613 words
(7.5 pages)
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Rate of Reaction Experiment - Sodium Thiosulphate and Hydrochloric Acid - Rate of Reaction Experiment - Sodium Thiosulphate and Hydrochloric Acid Plan Aim: Our aim of this experiment is see the effect of Sodium Thiosulphate and Hydrochloric Acid by testing different concentrations and looking at how it affects the rate of reaction. For my chemistry GCSE course work I am going to look at the factors that affect the rate of reaction. It can be changed by 4 main factors: Catalyst, Temperature, Surface area and Concentration. To increase the rate of a reaction you need to increase the number of successful collisions....   [tags: GCSE Chemistry Coursework Investigation] 1991 words
(5.7 pages)
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How the concentration of an acid affects the rate of reaction on marble chips - How the concentration of an acid affects the rate of reaction on marble chips Background: These different speeds of reaction are referred to as their rates. The rate of reaction depends on how often and how hard the reacting particles collide with each other. Particles have to collide in order to react, and the have to collide hard enough as well. This is called the collision theory. When the temperature is increased the particles all move quicker. If they are moving quicker then they are going to have more collisions....   [tags: GCSE Chemistry Coursework Investigation] 1986 words
(5.7 pages)
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The Reaction Between Marble Chips and Hydrochloric Acid - Using the syringe method I am going to investigate the reaction between Marble chips and hydrochloric acid by measuring the volume of carbon dioxide formed. Chemistry Using the syringe method I am going to investigate the reaction between Marble chips and hydrochloric acid by measuring the volume of carbon dioxide formed. This reaction rate will tell me how fast or slow a chemical reaction is and there are four things that could affect this greatly they are- * Concentration-An increase in concentration means there are more particles....   [tags: Chemistry Lab Experiment] 818 words
(2.3 pages)
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Thi Hostury uf thi Elimints end Piroudoc Tebli - ... Döbirionir doscuvirid thet thi etumoc wioght uf thi moddli ilimint on iech troed os ebuat iqael tu thi eviregi uf thi etumoc wioghts uf thi forst end thord ilimints. Lothoam, Sudoam, end Putessoam fulluwid thos rali fur ixempli. Hi sew thos pettirn on sivirel gruaps uf thrii es will. Thos wes thi bigonnong uf trinds on thi errengimints uf ilimints. Döbirionir elsu fuand thet thi dinsoty uf thi moddli ilimint on must troeds os ruaghly iqael tu thi eviregi uf thi dinsotois uf thi uthir ilimints....   [tags: Chemistry, Science, research papers] 990 words
(2.8 pages)
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Graham's Law - In chemistry and in physics, the movement of particles becomes very important. One way in which particles move is through effusion. The formula for the rate of effusion of gas molecules was developed by a chemist by the name of Thomas Graham in the 19th century. December 21, 1805�September 16, 1869. Thomas Graham was born in December of 1805 in Glasgow, Scotland. His father was a workman who desired that his son enter the Church of Scotland. However, Graham became a student at the University of Glasgow in 1819, where he became interested in the field of chemistry....   [tags: physics chemistry graham grahams law] 619 words
(1.8 pages)
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The Rate of Reaction in the Reaction Between Hydrochloric Acid and Sodium Thiosulphate - To see how the concentration of acid affects the rate of reaction in the reaction between hydrochloric acid and sodium thiosulphate. Planning; Aim To see how the concentration of acid affects the rate of reaction in the reaction between hydrochloric acid and sodium thiosulphate. Background; All reactions occur because of the particles that make up the reactants will collide, and if they have sufficient energy, react forming or breaking bonds. All four methods of increasing the rate of reaction can be explained in terms of increasing the number of collisions....   [tags: Chemistry]
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The Rate of the 'Reaction' Between Sodium Thiosulphate and Hydrochloric Acid - To see if the concentration of the acid will effect the rate of the 'reaction' between sodium Thiosulphate and Hydrochloric Acid. Scientific Knowledge: I already know that the rate of a reaction can be increased if there are more collisions between the different particles, to increase the number of collisions made, one or more of the following five factors can be changed; * More Heat- if there is more HEAT in a mixture, the particles will be moving QUCIKER and with more energy so there will be more collisions and a higher chance of success....   [tags: Chemistry] 1077 words
(3.1 pages)
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What factors affect the rate of a chemical reaction - What factors affect the rate of a chemical reaction NaS O + 2HCl 2NaCl + H O + SO + S I will be trying to find out how concentration affects the reaction between thiosulphate and hydrochloric acid. Prediction: I think that if the amount of thiosulphate is increased and the amount of water is decreased then the reaction will take less time because the collision theory states that if the concentration is increased, the number of particles in the will also increase, therefore the chance of successful collisions is increased and this speeds up the rate of the reaction....   [tags: Chemistry] 614 words
(1.8 pages)
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What factors affect the rate of reaction - What factors affect the rate of reaction I am going to measure the amount of hydrogen produced after the reaction between hydrochloric acid and magnesium. The amount of hydrogen produced by attaching a 100cm3 gas syringe to a clonical flask. As soon as the magnesium reacts with the hydrochloric acid the gas syringe will be attached to the conical flask and the stop watched started to see how long it takes for the amount of hydrogen produced. Diagram ======= I predict that the rate of reaction will decrease as the concentration of the hydrochloric acid decreases....   [tags: Chemistry] 505 words
(1.4 pages)
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Equilibrium Constant of an Ester Hydrolysis Reaction - The Equilibrium Constant of an Ester Hydrolysis Reaction Abstract The first step in determining the equilibrium constant of an ester hydrolysis reaction is to prepare five different reaction mixtures with the volume given in Table 1. the bottles have different mixtures of HCl, H2O, an unknown ester, and one bottle has alcohol. We will later determine the equilibrium constant for the reaction between the unknown ester and water to produce an unknown alcohol, and unknown acid....   [tags: Chemistry] 1197 words
(3.4 pages)
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Determination of Cu2+ by Titration - Determination of Cu2+ by Titration Introduction: The purpose of this lab is to determine the concentration of copper ions in an unknown solution. Complexometric titration will be used to determine the concentration. A buret will be used to deliver the complexing agent to the unknown solution. Ethylenediaminetetraacetic acid will be used as the complexing reagent. An indicator, Murexide in our case, will be used to indicate the endpoint of the reaction. Theories and Concepts: The anion of the acid, EDTA4-, will complex to the metal....   [tags: Chemistry] 507 words
(1.4 pages)
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Scientific Controversies - Facts and reasons cannot in most circumstances settle scientific controversies. The main issue is a matter of interpretation. One person can interpret data and observations differently from another person. This is where the problem lies. Pride and scientific interpretation can keep a controversy going even when facts and reasons may seem to prove one side false. Also, if there is more than model and those models each have some kind of positive evidence, then they each have a point to argue from....   [tags: Chemistry] 859 words
(2.5 pages)
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Potentiometeric Titrations - Title: Potentiometric Titration Purpose: The purpose of this lab was to construct a titration curve by titrating Formic acid using a standardized sodium hydroxide (NaOH) and a pH meter through potentiometric titration. After the data for the rest of the class is collected, compare and contrast the equivalence points to see how the concentrations of the various acids affected the acids weakness and strength. Methods: Obtain 0.020 M of Formic Acid (HCCOOH). Calibrate the pH meter using the instructions for calibrating the pH meter in the appendix....   [tags: Chemistry] 1297 words
(3.7 pages)
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Second Law of Thermodynamics - The second law of thermodynamics involves the concept of entropy, an idea that explains disorder in our world. The concept of entropy associates useful matter and waste with low entropy and high entropy, respectively. In order to look at entropy, we must first define the system of interest. For the remainder of this paper, the system will be Earth. Many people believe that everything we use up can be recycled and reused if we can develop the appropriate technology. However, the Second Law makes it essentially impossible to achieve complete recycling....   [tags: Chemistry] 431 words
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Acids and Bases - PURPOSE To investigate the reactions of a typical acid (dilute hydrochloric acid) with metals, metal oxides, carbonates and bases. APPARATUS The following materials in order to complete this experiment: <ul> <li> Dropper bottles containing 0.1M solutions of hydrochloric acid or limewater (calcium hydroxide) and sodium hydroxide. <li> Dropper bottle of bromothymol blue indicator <li> Small samples of the following metals: zinc, copper turnings, magnesium and iron <li> Copper (II) oxide powder <li> Magnesium oxide <li> Marble chips (calcium carbonate) <li> Sodium carbonate <li> 12 test tubes and test tube holder <li> Bunsen burner <li> Stopper or cork <li> Wax taper and matches </ul> PROCEDURE (a) REACTION WITH METALS <ol> <li value="1"> Place a small piece of magnesium ribbon in a test tube and add about 2mL of dilute HCL....   [tags: Chemistry] 1014 words
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Redox Reactions - To predict a number of redox reactions from a table of relative reactivities of some common oxidants and reductants, and then to check these predictions by experiment. APPARATUS The following materials are required in order to complete this experiment:<p>,,X Reaction palette or set of semi-micro test tubes and stand<p>,,X Clean plastic tray<p>,,X Latex gloves<p>,,X Goggles <p>,,X Set of small dropper bottles containing each of the following: <em>f</em>æ Freshly prepared FeSO4 <em>f</em>æ 0.1M FeCl3 solution <em>f</em>æ 1M sulfuric acid, H2SO4 <em>f</em>æ 0.1M H2O2 solution <em>f</em>æ 0.1M KSCN solution <em>f</em>æ 0.1M K3Fe(CN)6 <em>f</em>æ Freshly prepared 0.1M KI solution <em>f</em>æ 0.1M sulfurous acid solution, H2SO3 <em>f</em>æ 0.1M K2Cr2O7 <em>f</em>æ Freshly prepared starch solution....   [tags: Chemistry] 557 words
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Kinetic Production of Isoborneol through the Oxidation-reduction Sequences of Borneol - Through an oxidation-reduction reaction sequence, Borneol is converted to isoborneol. First, borneol is oxidized through a reaction with sodium hypochlorite at 400C to form camphor. When the camphor is then reduced by sodium borohydride, isoborneol is formed. The percent yeild of isoborneol collected was 56.4%, and the melting point range was found to be between 174.2-179.90C. Through analysis of the product through 1H NMR spectroscopy the percent purity is found to be 77.2% pure isoborneol. Introduction Oxidation-reduction reactions can be used to stereochemically control and produce many different organic molecules....   [tags: Chemistry] 635 words
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Determination of an Equilibrium Constant - OBJECTIVE: To determine the equilibrium constant for the following reaction: Fe3+(aq) + SCN-(aq) -----> Fe(SCN)2+(aq) BACKGROUND: In this experiment, the equilibrium constant, K, for the above reaction is given by the expression: K = [FeSCN 2+] [Fe 3+][SCN 1-] where the concentrations of the substances are those at equilibrium. The equilibrium concentrations of these substances will be determined and used to determine K....   [tags: Chemistry] 939 words
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Myuginoc Cill Lonis - ... A sognofocent ondactoun uf epuptutoc cills, uvirleppong thi friqaincois uf nun voebli cills, wes elriedy ubsirvid eftir 1h uf H2O2 ixpusari fur buth C2C12 end L6C5 cills, riechong ebuat 25% ± 4.1 end 27% ± 3.6 on C2C12 end L6C5 cills, rispictovily (p < 0.05 woth rispict thi antrietid caltaris). Aftir 24 hrs uf H2O2 - trietmint thi epuptutoc ondix wes 39% (C2C12) end 49% (L6C5). Thi cumbonetoun bitwiin hGH end H2O2 shuwid nut stetostocel doffirincis woth rispict thi trietmint woth H2O2 eluni, iothir fur thi cytutuxoc end thi epuptutoc ifficts (Fog....   [tags: Chemistry] 725 words
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Moxtari end Cumpuand Doffirincis - ... Elimint 2 Elimints eri sabstencis thet cennut bi brukin duwn farthir ontu somplir sabstencis by chimocel miens. Thiri eri carrintly 103 knuwn ilimints frum whoch ell mettir thet ixosts os medi. And thiy iech hevi thior uwn etumoc nambir besid un huw meny prutuns eri on thior naclias. Chimocel cumpuands eri crietid frum cumbonong e monomam uf twu ilimints tugithir on ixect prupurtouns. Cumpuands cen unly bi siperetid by e chimocel riectoun. Thi ricurd uf cumpuands un Eerth os prectocelly indliss....   [tags: Chemistry ] 634 words
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Thi Kribs Cycli - ... Trensotoun Riectouns teki pleci on thi pyraveti mulicali. In trensotoun riectouns twu hydrugin ilictruns end uni cerbun douxodi eri tekin ewey frum thi pyraveti end eddid tu Cuinzymi A. Thos os whiri thi Kribs cycli elsu knuwn es thi Cotroc cycli os riedy fur ecityl Cu-A. Thi forst kribs cycli wes pustaletid wes on 1937 by Hens Kribs, ot riprisints thi pruciss uf cills tu prudaci inirgy darong thi digredetoun uf inirgy-roch mulicalis. Thi Kribs cycli os cumprosid uf noni riectouns sirois on tutel....   [tags: Chemistry]
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