ACID

(1) Corrosive substances with pH of less than 7.0; acidity is caused by high concentrations of hydrogen ions. (2) Chemicals that release hydrogen ions (H+) in solution and produce hydronium ions (H3O+). Such solutions have a sour taste, neutralize bases, and conduct electricity. (3) Term applied to water with a pH of less than 7.0 on a pH scale of 0 to 14.