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A carboxyl group consists of a carbon double-bonded to an oxygen and also bonded to a-OH group. Compounds with carboxyl groups are called carboxylic acids or organic acids. The carboxyl group can act as an acid when by donating a proton (H +) to a solution and becoming ionized.
Carboxylic Acid Definition - What does Carboxylic Acid mean? Carboxylic acid is a type of organic compound that widely occurs in forms of acetic acid and amino acids, and is the main ingredient in vinegar. It is usually linked with extra functional groups. A typical carboxylic acid has around 10 carbon atoms, a low melting point, is in liquid form and possess an unpleasant smell.