CO₃²⁻ carbonate NO₃⁻ nitrate SO₃²⁻ sulfite SO₄²⁻ sulfate ClO₂⁻ chlorite ClO₃⁻ chlorate NH₄⁺ ammonium OH⁻ hydroxide CN⁻ cyanide CrO₄²⁻ chromate NO₂⁻ nitrite PO₄³⁻ phosphate ClO⁻ hypochlorite ClO₄⁻ perchlorate C₂H₃O₂⁻ acetate MnO₄⁻ permanganate HCO₃⁻ hydrogen carbonate or bicarbonate