Introduction The objective of this lab was to show how stoichiometry is applied to a specific chemical reaction. Stoichiometry is pretty much the math behind chemistry. Doing stoichiometry can calculate masses‚ moles‚ and percents with a chemical equation. The use of stoichiometry is how we were able to find the limiting reagent in this lab. A limiting reagent is the chemical that will be used up first. Many calculations had to be made throughout this lab. Some of the calculations we made were
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by 18/10/2012. 2. Findings 2.1 Who decides on the limitations of freedom of speech? The concept of Freedom of speech is one which is held sovereign by many constitutions and individuals‚ especially within the American states. The idea of limiting an American citizen’s freedom of speech would be highly offensive and seen as an act only a dictatorial Government would undertake which‚ with many factors considered‚ is true. The actions that in many cases are considered by these Governments are;
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Abstract: For the first part of this lab we refluxed different Carboxylic acids and alcohols in the presence of a acid catalyst in order to form Esters by Fischer Esterification. These Esters had different pleasant smells that we then evaluated. In the second part of the experiment‚ we broke the ester bonds of a triglyceride in order to form glycerol and carboxylate salts. This process is known as Saponification because it produces amphiphilic molecules that allow soap to remove dirt from the surface
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while 100 mL of base‚ stock solution of NaOH‚ was placed in another burette. 25 mL of KHP was placed into the Erlenmeyer flask‚ which was also recorded as the volume of acid in the flask. A total of 19 mL of base‚ NaOH‚ was required for the endpoint‚ which was indicated by a very pale pink color. To calculate the molarity of NaOH‚ the following equation was used MNaOH x VNaOH = MKHP x VKHP therefore the molarity was .125 M. INTRODUCTION This lab experiment covers the preparation of standard
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Biological Membrane Study: HCl‚ NaOH‚ SDS Objective and Hypothesis: The objective of this lab is to determine the effects of SDS‚ HCl‚ and NaOH on red cabbage cell membrane. Prior knowledge can tell us that the red cabbage is a red-purple color due to a pigment called anthocyanin. This is what we will be testing in the experiment. We also know that HCl is a strong acid (very low pH) and that NaOH is a strong base (very high pH). From information learned in this course (lecture/lab) we can assume that both
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Mass of CaCl2 1.00 2.00 3.00 Mass of K2CO3 2.5 g 2.50 2.50 Mass of filter paper 0.8 g 0.80 0.80 Mass of watch glass 38.5 g 38.5 38.5 Combined mass of product‚ filter paper‚ and watch glass 40.2 g 42.3 43.3 Mass of dry product 0.9 g 2.00 3.00 Calculations 1. Determine the limiting reagent for each trial. Show your calculations. (Hint: See the example in the Introduction.) Example: Trial 1: Note: These should be about the same and either CaCl2 or K2CO3 can be the limiting reagent depending
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| Preparation and standardization of 0.1 M NaOH using KHP | Analysis of unknown solid containing KHP | | Steanie Rodriguez | 6/7/2011 | CHEM-C311 Analytical Chemistry Laboratory July 7‚ 2011 The main purpose of this experiment is to identify an unknown organic acid by conducting various experiments to determine the acid’s unique properties. By determining selected constant properties of the unknown and then comparing these properties to the constant properties of known substances
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Lab #3: Stoichiometry of a Precipitation Reaction October 14‚ 2014 Abstract: The purpose of the lab‚ Stoichiometry of a Precipitation Reaction‚ is to be able to calculate the amount of a second reactant we need to react with the reactant one. You must calculate the amount of the second reactant using stoichiometry to figure out what amount is needed. After the amount is calculated‚ you then can add it to the first reactant and it will give you a full reaction. To figure out what you
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Limiting Homework English 101 Stundents Under Stress In the article “Students under Stress” author Marcia Clemmitt points out that students who are undergoing stress in school is because of the increase of homework. Too much homework is causing an increase of problems for students. The increase of homework is causing students to be depressed‚ stressed‚ and pressured unnecessarily‚ especially for students at young ages causing them to have a negative view of school. The amount of homework
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Fewer than one percent of people who are exposed to alcohol in the U.S have required medical attention due to consumption. Some people argue that strict laws on alcohol are needed to prevent people from endangering themselves or others‚ however if we taught moderation and responsibility at an early age we could still enjoy the benefits of drinking in a more controlled environment. The laws that focus on drinking need to be formed to include all of the teaching moments and benefits that go along with
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