Acetate
CH_3COO^-
Carbonate
CO_3^2-
Hydrogen carbonate or bicarbonate
HCO_3^-
Cyanide
CN^-
Chromate
CrO_4^2-
Ammonium
NH_4^+
Nitrite
NO_2^-
Nitrate
NO_3^-
Hydroxide
OH^-
Phosphate
PO_4^3-
Sulfate
SO_4^2_
Sulfite
SO_3^2-
Thiocyanate
SCN^-
chlorate
ClO3^-
chlorite
ClO2^-
hypochlorite
ClO^-
sodium dichromate
Na2Cr2O7