Carboxylate resonance hybrid

Carboxylate resonance hybrid.

Carboxylic acids are classified as weak acids. Typically, the pK+'s of a carboxylic acid is approximately 5. Even though they are categorized as 'weak' acids, having a pK+'s greater than 1, carboxylic acids are much stronger acids than alcohols. This is because the product of ionization is a resonance stabilized carboxylate ion, so the acid-base equilibrium is shifted to favor ionization when compared to alcohols.

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