For example, ethanoic acid (CH 3 COOH ... or the addition of hydrogen to a molecule. Carboxylic acids can also react with bases to form a salt and water in neutralisation reactions.

A carboxylic acid is one which contains -COOH as its functional group. In comparison to mineral acids, carboxylic acids show some similarities, but also, some important differences.

an 18-carbon saturated fatty acid. The normal numbering system, starting with the carboxylic acid, is shown in blue. The carbons and oxygens of the carboxylic acid functional group are red.

Chemically, an amino acid is a molecule that has a carboxylic acid group and an amine ... some amino acids have polar side chains that are soluble in water; examples include serine, threonine ...