Experiment 5 Gravimetric Determination of Sulfate Eisman E. Morales TA: Jackeline Pennywiit Chemistry 121 02/14/2011 Purpose: To determine the percent sulfate in a sample using a semimicro scale gravimetric procedure. Procedure: Refer to pages 41-42 of General Chemistry volume 1 Laboratory Experiments by Judith Casey and Robert Tatz‚ Hayden McNeil Publishing‚ 2010 Report Sheet See attached report sheet. Report Questions 1. Explain how your calculated value for percent
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Lennie and Crooks are two weak characters in of Mice and Men. In the tough working environment which was America’s 1920s‚ the time of the Great Depression‚ there was no place for mentally or physically insufficient people‚ it was survival of the fittest and “every man for himself.” We learn of Lennie’s non-existent capacity to care for himself early on in the novel. Even at the very start of the novel we see that “The two men walked in single file down the path‚ and even in the open one stayed behind
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STANDARDIATION OF ACID AND BASE Eunice Ivy B. Gamboa ABSTRACT Solutions of known concentration are prepared by dissolving measured masses of standard acids in distilled water. The concentrations of unknown solutions of sodium hydroxide are determined by titration. An acid solution reacts with a base solution in a "neutralization" reaction. Titrations permit the concentrations of unknown acids/bases to be determined with a high degree of accuracy. In order to analyze unknown acids/bases‚ we must have
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Determination of a Rate Law and Temperature Dependence of a Rate Constant By Marvin Coleman March 7‚ 2011 Abstract: From the shown calculations & graphical analysis‚ the experimentally determined rate law is rate = K[I-].969 [H2O2].991 and the experimentally determined activation energy is 59.50 kJ/mole. Introduction: The rate of a reaction varies at different temperatures and reactant concentrations. In this experiment‚ the orders and dependence of the rate constant of the products
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the amount of discrimination that it does‚ adding another way to subliminally segregate people would only make it worse. This question‚ “If we were able to exclude the eccentric‚ the different‚ the misfits‚ and the weak‚ what would happen to society?” is said as if the different‚ weak and misfits were not already excluded. Throughout all of history‚ the aforementioned of a community have been looked down upon by the rest of society. Even today the world struggles to accept these people. If this discrimination
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Ethanoic Acid Advantages: Ethanoic acid is non-toxic and is a weak acid‚ meaning it will not do any damage to most surfaces as it does not corrode or bind to other metals‚ therefore can be easily removed through washing or rinsing it. Disadvantages: Ethanoic Acid is the slowest de-scaler of the three acids‚ and is therefore the least effective. It also may cause an unpleasant smell‚ and can have a negative effect on the taste of coffee meaning one would need to spend longer time rinsing and cleaning
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The Celts - strong or weak? There are lots and lots of stories and opinions about whether the Celts were strong or weak. I am going to tell you both the sides of the argument and try to explain why they were defeated by the Roman invasions of 55BC and 43AD. The Celts did not write books so a lot of things we know come from things written by the Romans and archaeology. About 1‚000 BC a group of tribes formed in central Europe. They are now known as the Celts but they did not call themselves that
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Equilibrium: Finding equilibrium constant‚ Kc 1 Abstract Chemical reactions are accompanied with formation of products. A reaction can be reversible or forward according to the rate of formation of product. However‚ they do not reach completion and the mixture remains in equilibrium. This theory help us the study the existence of equilibrium constant‚ Kc. This constant is temperature dependent‚ and it must be calculated at given temperature. This equilibrium constant is used to improve the
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of mobility for users with laptops and smart phones while being able to stay connected to the internet by different networking topology. Wide Area Networks are used to connect server machines and computers across continents are countries for constant information updates. Wide Area Networks‚ are used across the globe‚ many networks connect with one another across continents to create one giant Wide Area Network. Wide Area Networks use optic fibre as their communication medium. The largest example
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Part A: Table 1: Fractionation of amino acid Fraction No | Response to Ninhydrin test(level of blue colour change) | Response to Sakaguchi test (colour change) | 1 | X | yellow | 2 | Dark blue | yellow | 3 | Dark blue | Pale orange | 4 | Blue | Pale orange | 5 | Pale blue | Pale orange | 6 | Blue | Pale orange | 7 | Pale blue | Pale orange | Discussion Part A In the separation and purification of a single protein or amino acids‚ a solution containing the desired analyte
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