OH-
hydroxide
CN-
cyanide
O22-
peroxide
C2O42-
oxalate
CO32-
carbonate
NO2-
nitrite
NO3-
nitrate
PO33-
phosphite
PO43-
phosphate
SO32-
sulfite
SO42-
sulfate
S2O32-
thiosulfate
CIO-
hypochlorite
CIO2-
chlorite
CIO3-
chlorate
CIO4-
perichlorate
CH3COO- or
C2H3O2-
acetate
AsO43-
arsenate
BO33-
borate
SiO32-
silicate
MnO4-
permangate
CrO42-
chromate
Cr2O72-
dichroamte
CHO2-
formate