Which of the following compounds has the maxi | vedclass

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(B) The acidity of substituted benzoic acids depends on the stability of the conjugate base (carboxylate ion) formed after the loss of a proton. In $o

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$2,6-$dihydroxybenzoic acid

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(B) The acidity of substituted benzoic acids depends on the stability of the conjugate base (carboxylate ion) formed after the loss of a proton. In $o$-hydroxybenzoic acid (Salicylic acid),the hydroxyl group at the ortho position forms an intramolecular hydrogen bond with the carboxylate group after the loss of a proton,which significantly stabilizes the conjugate base. In $2,6$-dihydroxybenzoic acid,there are two hydroxyl groups at ortho positions. The intramolecular hydrogen bonding is even more pronounced,and the inductive effect of the two hydroxyl groups further stabilizes the carboxylate anion. Therefore,$2,6$-dihydroxybenzoic acid has the highest $K_{a}$ value among the given options due to the strong stabilization of its conjugate base by intramolecular hydrogen bonding and inductive effects.

Which of the following compounds has the maximum $K_{a}$ value?

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