Common Polyatomic Ions—Learning-Laboratory.com

Practice on-screen or print. You may want to cross out ions not required by your instructor. You can also view/download a pdf version.


NameFormula/Charge
Acetate*C2H3O2-
AmmoniumNH4+
CarbonateCO32-
ChlorateClO3-
ChloriteClO2-
ChromateCrO42-
CyanideCN-
DichromateCr2O72-
Dihydrogen PhosphateH2PO4-
Hydrogen Carbonate (Bicarbonate)HCO3-
Hydrogen PhosphateHPO42-
Hydrogen Sulfate (Bisulfate)HSO4-
Hydrogen Sulfite (Bisulfite)HSO3-
HydroniumH3O+
HydroxideOH-
HypochloriteClO-
NitrateNO3-
NitriteNO2-
Oxalate*C2O42-
PerchlorateClO4-
PermanganateMnO4-
PhosphatePO43-
PhosphitePO33-
SulfateSO42-
SulfiteSO32-
ThiosulfateS2O32-
* Organic