carbonate ion
CO32-
phosphate ion
PO43-
sulfite ion
SO32-
ammonium ion
NH4+
nitrate ion
NO3-
acetate
C2H3O2
chlorate ion
ClO3-
perchlorate ion
ClO4-
hydroxide
OH-
sulfate ion
SO42-
mercury ion
Hg2+
oxalate ion
C2O42-
hypochlorite ion
ClO-
chlorite ion
ClO2-
permanganate
MnO4-
chromate ion
CrO42-
dichromate
Cr2O72-
peroxide
O22-
bicarbonate
HCO3-
nitrite ion
NO2-