Nitrite ion
NO2^-
Ammonium ion
NH4^+
Nitrate
NO3^-
Sulfite ion
SO3^2-
Sulfate ion
SO4^2-
Hydrogen sulfate ion (bisulfate ion commonly used)
HSO4^-
Hydroxide ion
OH^-
Cyanide ion
CN^-
Thiocyanate ion
SCN^-
Phosphate ion
PO4^3-
Hydrogen phosphate ion
HPO4^2-
Dihydrogen phosphate ion
H2PO4^-
Arsenate ion
AsO4^3-
Carbonate ion
CO3^2-
Hydrogen carbonate ion (bicarbonate ion commonly used)
HCO3^-
Hypochlorite ion
ClO^-
Chlorite ion
ClO2^-
Chlorate ion
ClO3^-
Perchlorate ion
ClO4^-
Acetate ion
CH3COO^-
C2H3O2^-
Permanganate ion
MnO4^-
Oxalate ion
(COO)2^2-
C2O4^2-
Dichromate ion
Cr2O7^2-
Chromate ion
CrO4^2-