Chemistry: All About You Module 6. Hands on activities: Water experiments CONTENTS Module 6. Hands on activities: Water experiments ................................................................... 2 1. Filtration ............................................................................................................................ 3 2. Solar Still challenge .......................................................................................................... 5
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Study of Water Purification Methods Water is the most essential component of life on Earth. In the United States‚ the average person uses about 75 gallons per day of freshwater. Most of this water is pre-treated in facilities and comes out of the tap clean and ready for drinking‚ a fact many take for granted. If you are camping and hiking you won’t always have access to this source of healthy‚ potable water. Unfortunately‚ many water sources in the wilderness include microorganisms‚ bacteria
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Activity- 6 3.5 Determination of pH Optimum 6 3.6 Determination of Michaelis-Menten Constant 7 3.7 Ammonium Sulphate Fractionation 7 3.8 Gel Filtration on Sephadex 7 3.9 Chromatography on DEAE-cellulose 7 4 Results 8 4.1 Freshly Prepared Crude 8 4.2 Crude Thawed after a Week of Freezing 9 4.3 Sephadex 25 Gel Filtration 11 4.4 Determination of Optimum pH 12 4.5 Ion Exchange Chromatography 13 4.6 Michaelis-Menten Kinetics 13 5 Discussion and Conclusion 14 6
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Jennie K. Daniels Organic Chemistry 2121 11 February 2014 Synthesis of Aspirin Salicylic acid derivatives‚ or salicin‚ are found in the bark of the willow tree. In the 5th century B.C.‚ Hippocrates ground the bark into a powder‚ and later‚ the Natives Americans chewed on the bark to alleviate fever and pain1. In the 19th century‚ a German chemist by the name of Felix Hoffman wanted to find a medication that would ease
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transamination‚ deamination‚ and urea formation and the carbon skeletons are generally used to feed into carbohydrate metabolism. These ketone bodies have a great propensity to decrease urinary pH. Acid base balance in the body is therefore disrupted. Glomerular filtration rate will be increased and a decrease in renal tubular reabsorption of calcium resulting in calcium
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reduce cerebral edema to decrease ICP. Mannitol mechanism of action is to reduce ICP by drawing water from the brain parenchyma‚ does not cross brain-blood barrier (BBB). But also causes profound osmotic diuresis by increases the osmotic pressure of glomerular filtrate‚ inhibits tubular reabsorption of water and electrolytes‚ increases urinary output if renal failure or hypovolemia is a concern could be devastating to patient’s outcome. HTS mechanism of action is the same osmotic gradient in the BBB
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Recrystallization and Melting Point of Benzoic Acid Organic Chemistry 1 10/4/12 Abstract Recrystallization was done to remove impurities from the sample. The percent recovery of benzoic acid during recrystallization is 23.02%. The difference between the pure and impure samples was observed by comparison of melting points. It was found that impure sample had a lower and wider melting point range of 120.1-122.2 (C). The pure sample melting point range was 121.3-122.5 (C). These ranges helped determine
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Melting point 1. What two effects do impurities have on the melting point of an organic compound? Soluble impurities affect the melting point of a solid in the following manner. a. The presence of an impurity in the molten compound reduces its vapor pressure thus lowering the melting point of the compound. b. Broaden the melting point range. 2. For what tow purpose are melting points routinely used a. To determine the identity of an organic solid. b. To determine the purity of an organic solid
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Immigration Act of 1903 all to insure specific laws and boundaries set on immigrants. The life of immigrants has been drastically changed throughout the years of 1880-1925 through aspects such as immigrants taking non-immigrants wages and jobs‚ the filtration process of immigrants into the United States‚ and lastly‚ the foreign policies of the immigrants and their allowance into the nation. Much of the controversy that was brought up during this time period was based on the fact that immigrants were
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such as extraction‚ evaporation‚ and filtration‚ the three components will be isolated based on their solubilities and acid-base properties. The percent composition of Panacetin will also be deduced based on the masses of the three dried components; this is done to verify the composition attained is consistent with those listed on the preparations label. As a result of this investigation‚ my teammates and I allowed the Panacetin to undergo gravity filtration and separation techniques in order to
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