Post Lab Questions: 1) Draw the structure of aspirin. Circle and identify three
ID: 944203 • Letter: P
Question
Post Lab Questions: 1) Draw the structure of aspirin. Circle and identify three functional groups in the 2) Bufferin is aspirin mixed with magnesium carbonate. What is the purpose ot molecule magnesium carbonate in the formulation? If all the measurements and calculations are correct in experimentation, what would cause a percent yield to be greater than 100%? Can one get relief from expired aspirin? Why or why not? What mass of salicylic acid is needed to produce one extra strength tablet (500 mg of aspirin) if the reaction has a 60.0% yield? (reminder: for full credit you must show all your calculation steps, use the correct units and report your answer with the correct number of significant figures 3) 4) 5)Explanation / Answer
1.) The structure of aspirin is already drawn . The functional. Groups are carboxylic, and acetyl.
2) Magnesium carbonate is added to counter any acidity that arises from aspirin
3) the product is not dry.
5) Mol. Wt. Of aspirin is 180.16 and that of salicylic acid is 138.12
therefore if the yield is 60%, then 138.12 g of acid gives 180.16 x 60/ 100 g of aspirin
hence to produce 500 mg of aspirin salicylic acid required = 138.12 x 500 x 100/ 180.16 x 60 = 638.88 mg
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