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Organic Chemistry

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Alcohols

Question
12 out of 15
 

Alcohols are of tremendous use for the synthesis of a wide variety of organic compounds. They also have some very unique properties. Alcohols are in fact slightly weaker acids than water, and have pKa values between 16 and 18.

An alcohol can loose its acidic hydrogen to form an alkoxide ion.

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Which of the following is the most acidic?

A (CH3)3COH
B NH3
C (CH3)2CHOH
D CH3OH
Ans. D Primary alcohols are more acidic than secondary alcohols, and secondary alcohols are more acidic than tertiary alcohols. Ammonia is much weaker than any other compound in the remaining choices. In fact NH3 has a pKa of roughly 36. All the alcohols listed have pKa values ranging from 16 through 18.

Alcohols Flashcard List

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