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If 1.4 g of salicylic acid and 3.1 g of acetic anhydride were used, how much...

If 1.4 g of salicylic acid and 3.1 g of acetic anhydride were used, how much water (mL) would be required to decompose the remaining acetic anhydride during the synthesis of aspirin? (However, the reaction is assumed to proceed 100%, ignoring the amount of water in the phosphoric acid.)
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