Aspirin (C9H8O4) is produced from salicylic acid (C7H6O3) according to the equation below: 2 C7H6O3 + C4H6O3 → 2 C9H8O4 + H2O. What mass of water is produced when 540 g of aspirin are produced?

According to balanced equation, 1 mol of salicylic acid completely reacts with 1 mol of acetic anhydride

Number of moles = (mass)/(molar mass)

Molar mass of acetic anhydride = 102.09 g/mol

Molar mass of salicylic acid = 138.121 g/mol

So,  of salicylic acid =  of salicylic acid

Hence,  of salicylic acid reacts completely with  of acetic anhydride.

So, mass of acetic anhydride needed =  =

Explanation:

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