Assertion (A): Carboxylic acids are more acid | vedclass

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(A) Carboxylic acids are stronger acids than phenols because the carboxylate ion formed after the loss of a proton is more stable than the phenoxide i

Vedclass · Accepted Answer

Both $(A)$ and $(R)$ are correct and $(R)$ is the correct explanation of $(A)$

Vedclass · Answer

(A) Carboxylic acids are stronger acids than phenols because the carboxylate ion formed after the loss of a proton is more stable than the phenoxide ion. In the carboxylate ion $(RCOO^-)$,the negative charge is delocalized over two highly electronegative oxygen atoms,resulting in two equivalent resonance structures. In the phenoxide ion $(C_6H_5O^-)$,the negative charge is delocalized over the aromatic ring,placing the negative charge on the less electronegative carbon atoms in some resonance structures. Since equivalent resonance structures provide greater stability,the carboxylate ion is more stable,making carboxylic acids more acidic.

Assertion $(A)$: Carboxylic acids are more acidic than Phenols.
Reason $(R)$: Resonance structures of carboxylate ion are equivalent,while resonance structures of phenoxide ion are not equivalent.

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Assertion $(A)$: Carboxylic acids are more acidic than Phenols. Reason $(R)$: Resonance structures of carboxylate ion are equivalent,while resonance structures of phenoxide ion are not equivalent.