Asprin Essay

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Conclusion: The purpose of this experiment is about the synthesis and characterization of aspirin. Salicylic acid and acetic anhydride will be mixed to produce acetylsalicylic acid and acetic acid. The catalyst is H3PO4. After crystallization, the aspirin was filtered using a vacuum filtration system and dried in an oven. A melting point will be ran on the aspirin when completely dry. A capillary tube containing the dry aspirin will be placed into the melting-point apparatus. This process is to determine the melting point range of aspirin. First, a hot water bath was created with a 400. mL beaker on a hot plate. The temperature was raised to 70 degrees Celsius and 4.419 g of salicylic acid was measured out on a balance and transferred into a 125. mL Erlenmeyer flask. Next, 8.00 mL of acetic anhydride was measured out and poured into the flask containing salicylic acid, ten drops of phosphoric acid was placed inside. The flask was then immersed into the hot water bath for twenty minutes. A vacuum filtration system was set up and the contents of the flask was transferred onto the filter paper. The mass of the filter paper and watch glass was 42.7131 grams. The mass of the filter paper, watch glass, and aspirin product after drying was 46.5388 grams. The mass of aspirin (actual yield) in grams was 3.8257, which was calculated by subtracting the mass of the filter paper, watch glass, and aspirin product after drying from the mass of the filter paper and watch glass. The limiting reactant is the salicylic acid. The theoretical yield of aspirin is 5.77 grams. The percent yield of aspirin is 66.3%, which was calculated by dividing the mass of aspirin (actual yield) by the theoretical yield of aspirin times 100%. A side reaction happened when acetic anhydride and water produced acetic acid. This means that when using water to rinse out the Erlenmeyer flask,

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