Acetate ion
C2H3O2-
Carbonate ion
CO3^2-
Cyanide ion
CN^-
Hydroxide ion
OH^-
Nitrate ion
NO3^-
Nitrite ion
NO2^-
Sulfate ion
SO4^2-
Sulfite ion
SO3^2-
Phosphite ion
PO3^3-
Phosphate ion
PO4^3-
Perchlorate ion
ClO4^-
Chlorate ion
ClO3^-
Permanganate ion
MnO4^-
Hydrogen carbonate ion
HCO3^-
Dichromate ion
Cr2O7^2-
Ammonium ion
NH4+