The name of an acid is related to the name of the parent anion (the anion that combines with H+ to form the acid). Acids formed from anions whose names end in -ide have the prefix hydro- and the ending -ic.
| F− | Fluoride | HF | Hydrofluoric acid |
| Br− | Bromide | HBr | Hydrobromic acid |
Acids formed from oxyanions are called oxyacids. If the anion ends in -ite (less oxygen), then the acid will end with -ous acid. If the anion ends in -ate (more oxygen), then the acid will end with -ic acid. Prefixes in the names of the anions are retained. Some examples:
| ClO− | Hypochlorite | HClO | Hypochlorous acid |
| ClO2− | Chlorite | HClO2 | Chlorous acid |
| ClO3− | Chlorate | HClO3 | Chloric acid |
| ClO4− | Perchlorate | HClO4 | Perchloric acid |
| NO2− | Nitrite | HNO2 | Nitrous acid |
| NO3− | Nitrate | HNO3 | Nitric acid |