Chromium
Cr2+ (II)Cr3+ (III)
Iron
Fe2+ (II)Fe3+ (III)
Cobalt
Co2+ (II)Co3+ (III)
Copper
Cu+ (I)Cu2+ (II)
Tin
Sn2+ (II)Sn4+ (IV)
Mercury
Hg22+ (I)Hg2+ (II)
Lead
Pb2+ (II)Pb4+ (IV)
Acetate
C2H3O2-
Carbonate
CO32-
Hydrogen carbonate
bicarbonate"HCO3-
Hydroxide
OH-
Nitrite
NO2-
Nitrate
NO3-
Chromate
CrO4-2
Dichromate
Cr2O72-
Phosphate
PO43-
Hydrogen Phosphate
HPO42-
Dihydrogen Phosphate
H2PO4-
Ammonium
NH4+
Hypochlorite
ClO-
Chlorite
ClO2-
Chlorate
ClO3-
Perchlorate
ClO4-
Permanganate
MnO4-
Sulfite
SO32-
Hydrogen sulfite
bisulfite"HSO3-
Sulfate
SO42-
Hydrogen sulfate
HSO4-
Cyanide
CN-
Peroxide
O22-