Common Anions and Cations

Mercury(I) or mercurous

Hg₂²⁺

Ammonium

NH₄⁺

Peroxide

O₂^-

Hydroxide

OH^-

Cyanide

CN^-

Phosphate

PO₄^3-

Monohydrogen phosphate

HPO₄^2-

Dihydrogen phosphate

H₂PO₄^-

Carbonate

CO₃^2-

Hydrogen carbonate (bicarbonate)

HCO₃^-

Sulfate

SO₄^2-

Hydrogen sulfate (bisulfate)

HSO₄^-

Sulfite

SO₃^2-

Hydrogen sulfite (bisulfite)

HSO₃^-

Acetate

C₂H₃O₂^-

Oxalate

C₂O₄^2-

Chromate

CrO₄^2-

Dichromate

Cr₂O₇^2-

Permanganate

MnO₄^-

Nitrate

NO₃^-

Nitrite

NO₂^-

Hypochlorite

ClO^-

Chlorite

ClO₂^-

Chlorate

ClO₃^-

Perchlorate

ClO₄^-