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I hope someone still reads this.. - CHS Chem Help Online

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Previous Entry I hope someone still reads this.. Oct. 13th, 2004 @ 10:23 pm Next Entry
OK, basic chem question.

Aspirin is prepared by the reaction of salicylic acid(C7H6O3) with acetic anhydride(C4H6O3) according to the following equation:

C7H6O3 + C4H6O3 ----> C9H8O4 + CH3CO2H

How many grams of acetic anhydride are needed to react with 4.50 grams of salicylic acid? How many grams of aspirin are formed? How many grams of acetic acid are formed as a by-product?

I found the weight of acetic anhydride(3.32 grams) but I cannot for the life of me figure out how to find the weights of the aspirin and the acetic acid. Any help?
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From:lensovet
Date:October 15th, 2004 07:13 pm (UTC)

easy!

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thats easy, you find them in the same manner as you find the mass of acetic anhydride - convert salicylic acid into moles, then multiply by the molecular weight of aspirin and the acetic acid, respectively.
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