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Question

CH3COO ion is a:

A
weak conjugate base
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B
strong conjugate base
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C
weak conjugate acid
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D
strong conjugate acid
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Solution

The correct option is D strong conjugate base
Acetic acid (CH3COOH) is a weak acid.
In water it dissociates partially into hydrogen ion H+ and the acetate ion CH3COO1. The acetate ion thus formed is a conjugate base of acetic acid.
Strong acids have a weaker conjugate base whereas weak acids have a strong conjugate base.
Since acetic acid is a weak acid, it's conjugate base is strong in nature.
Hence, the correct answer is option (B).

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