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Carboxylic acid definition

Carboxylic acids are organic molecules containing the acidic functional group $$\ce{-COOH}$$. They have the general formula $$\text{C}_\text{n}\text{H}_{2\text{n}+1}\text{COOH}.$$

The functional group of carboxylic acids, ($$\ce{-COOH})$$, is called the carboxyl group.

Carboxylic acids are colourless liquids at room temperature and pressure.

The table shows the first four acids in the homologous series.

Name Diagram Formula
Methanoic acid
Ethanoic acid
Propanoic acid
Butanoic acid