organic chem

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Please help!
It's one of the prelab questions.

**Exp. Ethanol from Sucrose
The diethylacetal of acetaldehyde can be detected by gas chromatography. How does this impurity arise in fermentation?

**Exp. Acetaminophen
In the reaction between p-aminophenol and acetic anhydride to form acetaminophen, 4.5 mL of water were added. What was the purpose of the water?

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