| nitrate | NO3 -1 | chromate | CrO4 -2 |
| chlorate | ClO3 -1 | dichromate | Cr2O7 -2 |
| sulfate | SO4 -2 | phosphate | PO4 -3 |
| carbonate | CO3 -2 | acetate | C2H3O2 -1 |
| hydroxide | OH -1 | cyanide | CN -1 |
| ammonium | NH4 +1 |
To add a hydrogen, increase the charge by one. Example: sulfate = SO4 -2, hydrogen sulfate = HSO4 -1.
| nitrite | NO2 -1 | hydrogen sulfate | HSO4 -1 |
| chlorite | ClO2 -1 | hydrogen sulfite | HSO3 -1 |
| sulfite | SO3 -2 | hydrogen carbonate | HCO3 -1 |
| phosphite | PO3 -3 | hydrogen phosphate | HPO4 -2 |
| hypochlorite | ClO -1 | dihydrogen phosphate | H2PO4 -1 |
| perchlorate | ClO4 -1 | oxalate | C2O4 -2 |
| permanganate | MnO4 -1 | silicate | SiO3 -2 |
| thiocyanate | SCN -1 |
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