In this lab we used one of the most common synthetic medicine, Aspirin. Aspirin is the common name but it can also be known as Acetyl Salicylic Acid. Aspirin came to be because the hard work of scientist who were trying to relieve pain and fight fever without the patient suffering deadly side effects. A breakthrough occurred when a chemist named Felix Hoffman knew that phenolic compounds are corrosive because of the free hydroxyl group located on the benzene ring of salicylic acid. He then masked the hydroxyl group by replacing the hydrogen with an acetyl group creating Aspirin. The purpose of this lab is to synthesize and analyze high pure aspirin. The aspirin synthesized in this experiment will use acetic anhydride to convert salicylic acid to aspirin also it served as
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Once it was heated and left to cool to room temperature the crystallization process began. It did took about several minutes to see some crystallization but once it did a bunch of crystals began to appear. To speed up the process we stirred the solution. When we separated the aspirin from the mixture while using vacuum filtration some of our product was lost during the transfer. In the purification section, we used 20 mL of ethanol and 40 mL of water to reduce the likelihood of hydrolysis. Those amounts were used because on the first 10 mL of ethanol and 20 mL of water were not sufficient to recrystallized the aspirin. On the analysis section of the experiment the results were acceptable because for the test we got one test tube turned purple, which the test tube had salicylic acid. The second test tube turned gold yellow with some purple color, that test tube was the crude product, The final test tube was gold yellow, that test tube had the final product pure aspirin. For the percent yield, the product we obtained was 1.98 g. and the stoichiometry product was 2.71 g. giving us the percent yield of
Once it was heated and left to cool to room temperature the crystallization process began. It did took about several minutes to see some crystallization but once it did a bunch of crystals began to appear. To speed up the process we stirred the solution. When we separated the aspirin from the mixture while using vacuum filtration some of our product was lost during the transfer. In the purification section, we used 20 mL of ethanol and 40 mL of water to reduce the likelihood of hydrolysis. Those amounts were used because on the first 10 mL of ethanol and 20 mL of water were not sufficient to recrystallized the aspirin. On the analysis section of the experiment the results were acceptable because for the test we got one test tube turned purple, which the test tube had salicylic acid. The second test tube turned gold yellow with some purple color, that test tube was the crude product, The final test tube was gold yellow, that test tube had the final product pure aspirin. For the percent yield, the product we obtained was 1.98 g. and the stoichiometry product was 2.71 g. giving us the percent yield of