polyatomic ion notes

to be memorized!

-1 Ions

- ClO⁻ - Hypochlorite

- ClO₂⁻ - Chlorite

- ClO₃⁻ - Chlorate

- ClO₄⁻ - Perchlorate

- (Chlorine + oxygen compounds)

- BrO₃⁻ - Bromate

- IO₃⁻ - Iodate

- IO₄⁻ - Periodate

- MnO₄⁻ - Permanganate

- OH⁻ - Hydroxide

- C₂H₃O₂⁻ or CH₃COO⁻ - Acetate

- CN⁻ - Cyanide

- HSO₃⁻ - Hydrogen Sulfite

- HSO₄⁻ - Hydrogen Sulfate

- HCO₃⁻ - Hydrogen Carbonate (Bicarbonate)

-2 Ions

- SO₃²⁻ - Sulfite

- + H⁺ → HSO₃⁻ - Hydrogen Sulfite

- SO₄²⁻ - Sulfate

- + H⁺ → HSO₄⁻ - Hydrogen Sulfate

- S₂O₃²⁻ - Thiosulfate

- CO₃²⁻ - Carbonate

- + H⁺ → HCO₃⁻ - Hydrogen Carbonate (Bicarbonate)

- CrO₄²⁻ - Chromate

- Cr₂O₇²⁻ - Dichromate

- O₂²⁻ - Peroxide

-3 Ions

- PO₄³⁻ - Phosphate

- + H⁺ → HPO₄²⁻ - Hydrogen Phosphate

- + H⁺ → H₂PO₄⁻ - Dihydrogen Phosphate

- AsO₄³⁻ - Arsenate