Common Polyatomic Ions Chem 101 Unit 2

NH4⁺

ammonium

OH^-

hydroxide

CN^-

cyanide

ClO^-

hypochlorite

ClO₂^-

chlorite

ClO₃^-

chlorate

ClO₄^-

perchlorate

C₂H₃O₂^- or CH₃COO^-

acetate

MnO₄^-

permanganate

NO₂^-

nitrite

NO₃^-

nitrate

HCO₃^-

bicarbonate or hydrogen carbonate

CO₃^2-

carbonate

HSO₄^-

hydrogen sulfate

SO₃^2-

sulfite

SO₄^2-

sulfate

H₂PO₄^-

dihydrogen phosphate

HPO₄^2-

hydrogen phosphate

PO₃^3-

phosphite

PO₄^3-

phosphate

CrO₄^2-

chromate

Cr₂O₇^2-

dichromate