NH4+
Ammonium
CH3COO-
acetate
MnO4-
permaganate
NO3
Nitrate
NO2
Nitrite
ClO4-
Perchlorate
ClO3-
Clorate
ClO2-
chlorite
ClO-
hypochlorite
CrO4 2-
chromate
Cr2O7 2-
dichromate
SO4 2-
sulfate
SO3 2-
sulfite
HSO4-
hydrogen sulfate or bisulfate
CO3 2-
carbonate
HCO3-
hydrogen carbonate
PO4 3-
phosphate
HPO4 2-
hydrogen phosphate
H2PO4-
dihydrogen phosphate
CrO4 2-
oxalate
O2 2-
peroxide