gentle heating. Poured the yellow solution into sep funnel. Added 10 ml CH2Cl2 to flask to rinse‚ poured solution into sep funnel. Added 15 ml 3 M HCl‚ gently mixed and vented (saw bubbles during mixing‚ heard the evolution of gas while venting). Allowed layers to separate. Upper layer determined to be aqueous by density: lower layer removed. Upper layer placed into separate flask labeled “A” for acid extract. Lower layer placed into sep. funnel and reextracted with 15 ml 3 M HCl. Combined aqueous
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concentrated sulfuric acid (1.5ml) until equilibrium is achieved. A reflux apparatus is set up for 1 hour to carry out the reaction at the boiling point of the solvent (Methanol‚ 2.5ml). Then‚ separation though an extraction apparatus and/ or separatory funnel got rid of the compounds‚ excluding dichloromethane‚ in a series of four steps. The basicity had to be tested to check and see whether the unreacted Benzoic acid was removed. Finally‚ the excess water had to be removed as well to achieve a pure dichloromethane
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grams X 100 % Recovery= 0.16 x 100=16% There are many reasons why the percent recovery is much less than 100%. For example‚ one source of error may have been that the separatory funnel containing the acidified phenylalanine and ethyl acetate may not have separated well enough after being shaken together in the funnel. Not allowing an adequate amount of time for the aqueous and organic layers to separate will cause portions of the layers to be contaminated. This would affect the experimental results
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Crash! My house collapsed under the severe winds. Both hurricanes and tornadoes have things in common‚ but they also have many differences. Hurricanes and tornadoes are absolutely two of the strongest storms known to man. Both of these storms have many attributes. These two can grow completely massive compared to us‚ but not each other. Also all around the U.S. people are affected by these storms. To start off‚ you will need to know what a hurricane and a tornado looks like. Beginning with hurricanes
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Formal Lab Report 1 Chemistry 100-03 March 19‚ 2012 Abstract: • Introduction/Objective: Prepare and analyze aspirin from salicylic acid and acetic anhydride‚ and calculate the percent yield of the synthesized aspirin. • Materials and Methods: This experiment called for the synthesis of acetylsalicylic acid‚ or aspirin‚ by using salicylic acid‚ acetic anhydride‚ sulfuric acid‚ and vacuum filtration. The salicylic acid and the acetic anhydride were mixed in a flask. Sulfuric
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Recrystallization Estopace‚ Edgie1‚ Polintan‚ Clarisse K. Professor Edgie Estopace‚ School of Chemical Engineering‚ Chemistry and Biotechnology‚ Mapua Institute of Technology; Clarisse Polintan‚ CHM145L/A21‚ School of Chemical Engineering‚ Chemistry and Biotechnology‚ Mapua Institute of Technology ABSTRACT This experiment is all about identifying the appropriate solvent for recrystallization and technique and to use the recrystallization technique in purifying a solid sample. Most organic
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distinct layers were clearly visible in the separatory funnel‚ the organic layer or the DCM containing the extracted caffeine in the water was extracted. The process was repeated three times and the collected organic layer (DCM layer) was placed in an Erlenmeyer flask. The combined organic layer was transferred back to the separatory funnel and was washed with sodium hydroxide. After washing‚ the organic layer was again extracted from the funnel and placed in a beaker containing anhydrous sulphate
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Abstract The purpose of this experiment is to synthesize isopentyl acetate via an esterification reaction between glacial acetic acid and isopentyl alcohol‚ using concentrated sulfuric acid as a catalyst. The product was washed using sodium bicarbonate and water‚ then dried with anhydrous sodium sulfate. It was then distilled using a standard simple distillation apparatus. The percent yield of isopentyl acetate was 60.39%. This may have been low due to incomplete distillation or evaporation once
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Solvent/Water Trap Diagram Rodney Atwaters Halle Bair May 28‚ 2013 Chemistry 36100 Introduction The purpose of this lab was to produce benzoic acid by mixing sodium benzoate with hydrochloric acid. The Hydrochloric acid used in the experiment was a stock solution made by mixing HCl Acid and deionized water. HCl acid‚ historically called‚ muriatic acid or spirits of salt‚ hydrochloric acid is produced from sulfuric acid and common salt‚ NaCl (Princeton.edu). Since the early 1900 ’s‚ sodium
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of two acids are then compared. Chemicals Maleic acid‚ magnesium ribbon‚ sodium carbonate‚ concentrated hydrochloric acid‚ bromine water‚ pH paper Apparatus 100cm3 and 250cm3 beakers‚ watch glass‚ apparatus for suction filtration (Büchner funnel and filter flask)‚ melting point apparatus‚ 25 cm3 measuring cylinder Procedures A Conversion of maleic acid to fumaric acid. 1. Weigh out about 4g of maleic acid in a clean dry 100cm3 beaker. Add 10cm3 of deionised water and warm slightly
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