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Question

Chemistry Question on Acids and Bases

The strongest conjugate base is

A

NO3NO^-_3

B

ClCl^-

C

SO42SO^{2-}_4

D

CH3COOCH_3COO^-

Answer

CH3COOCH_3COO^-

Explanation

Solution

Weak acid forms strong conjugate base. In HNO3,HCl,H2SO4, HNO_3, HCl , H_2SO_4 , and CH3COOH,CH3COOHCH_3COOH , CH_3COOH is weakest acid, so its conjugate base is strongest CH3COOHCH3COO+H+CH_3COOH \rightleftharpoons CH_3COO^- + H^+