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MCAT Question A Day - 2/2/14 - Answer!

When acetaldehyde reacts with ethanol in the presence of acid, the product is a(n)

A.  acetal.
B.  hemiacetal.
C.  ketal.
D.  hemiketal.

The correct answer is (A). Two ethanol molecules will bond to the carbonyl carbon in the presence of acid.

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