Weight of salicylic acid used ___g Weight of aspirin recovered ___g Calculate th

Question

Weight of salicylic acid used ___g Weight of aspirin recovered ___g Calculate the moles of salicylic acid used: Moles = weight (g) [step 1 above]/molecular weight (C_7H_6O_3) = Calculate the moles of aspirin formed: weight (g) [step 2 above]/molecular weight (C_9H_8O_4) = Percentage yield = moles aspirin formed [step 4]/moles salicylic acid used [step 3] times 100 = Write the equation for the preparation of aspirin from salicylic acid and acetic anhydride. Have you prepared pure aspirin? Do you expect any other material to be in your product after washing and filtering it?

Explanation / Answer

Q1.

equation of aspirin from salicylic acid + acetic anhydride

C4H6O3+C7H6O3C9H8O4+C2H4O2

Q2.

You will expect:

aspirin + acetic acid (from the anhydride)

therefore, you will have to separate both!

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