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.

We can say that ethanoic acid is a weaker acid than hydrochloric acid as it only partly ionises in water. Hydrochloric acid is a strong acid and completely ionises in water.

In initial tests, the carbohydrate "charm" that attracted and bound ionic cadmium most efficiently contained a carboxylic acid group. Next, in tests of water spiked with ionic cadmium, the polymer ...

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.