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What is the pKa of carboxylic acid?

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Quick Answer

Several carboxylic acids exist with different pKa values. The simplest carboxylic acid, acetic acid, has a pKa value of 4.7. A carboxylic acid is an organic compound containing the functional group COOH. Additional carboxylic acids include benzoic and formic, with pKa values of 4.2 and 3.7, respectively.

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Full Answer

Because they are proton donors, carboxylic acids are considered Bronsted-Lowry acids. They are weak acids and partially dissociate into H+ cations and RCOO - anions in neutral aqueous solution. Carboxylic acids can be prepared by the oxidation of arene side-chains, the oxidation of primary alcohols, the oxidation of aldehydes and the oxidative cleavage of alkenes and alkynes.

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