Common Polyatomic Ions (Large Set)

Full set of ions recommended to have memorized for chem I

NH₄⁺

Ammonium

OH^-

Hydroxide

H₃O⁺

Hydronium

C₂H₃O₂^-

Acetate

C₂O₄^2-

Oxalate

CO₃^2-

Carbonate

HCO₃^-

Hydrogen carbonate

O₂^2-

Peroxide

CN^-

Cyanide

SCN^-

Thiocyanate

MnO₄^-

Permanganate

CrO₄^2-

Chromate

Cr₂O₇^2-

Dichromate

NO₃^-

Nitrate

NO₂^-

Nitrite

PO₄^3-

Phosphate

PO₃^3-

Phosphite

HPO₄^2-

Hydrogen phosphate

H₂PO₄^-

Dihydrogen phosphate

SO₄^2-

Sulfate

SO₃^2-

Sulfite

HSO₄^-

Hydrogen sulfate

ClO₄^-

Perchlorate

ClO₃^-

Chlorate

ClO₂^-

Chlorite

ClO^-

Hypochlorite