| A | B |
|---|
| ammonium | NH4 (+1) |
| nitrite | NO2 (-1) |
| nitrate | NO3 (-1) |
| sulfite | SO3 (-2) |
| sulfate | SO4 (-2) |
| hydrogen sulfate (bisulfate) | HSO4 (-1) |
| hydroxide | OH (-1) |
| cyanide | CN (-1) |
| phosphate | PO4 (-3) |
| hydrogen phosphate | HPO4 (-2) |
| dihydrogen phosphate | H2PO4 (-1) |
| carbonate | CO3 (-2) |
| hydrogen carbonate (bicarbonate) | HCO3 (-1) |
| hypochlorite | ClO (-1) |
| chlorite | ClO2 (-1) |
| chlorate | ClO3 (-1) |
| perchlorate | ClO4 (-1) |
| acetate (ethanoate) | C2H3O2 (-1) |
| permanganate | MnO4 (-1) |
| dichromate | Cr2O7 (-2) |
| chromate | CrO4 (-2) |
| peroxide (not one of our 25) | O2 (-2) |
| bromate (not one of our 25) | BrO3 (-1) |
| hydride (this is the anion of hydrogen) | H (-1) |
| iodate (not one of our 25) | IO3 (-1) |
| oxalate | C2O4 (-2) |
| arsenate (not one of our 25) | AsO4 (-3) |
| phosphite | PO3 (-3) |
| hydrogen sulfite (bisulfite) | HSO3 (-1) |
| silicate | SiO3 (-2) |
