Formulas and Names of Some Common Polyatomic Ions

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Terms taken from Table 2.4 on Page 74.

CN⁻

cyanide

CH₃CO₂⁻

acetate

CO₃²⁻

carbonate

HCO₃⁻

hydrogen carbonate

NO₂⁻

nitrite

NO₃⁻

nitrate

PO₄³⁻

phosphate

HPO₄²⁻

hydrogen phosphate

H₂PO₄⁻

dihydrogen phosphate

OH⁻

hydroxide

SO₃²⁻

sulfite

SO₄²⁻

sulfate

HSO₄⁻

hydrogen sulfate

ClO⁻

hypochlorite

ClO₂⁻

chlorite

ClO₃⁻

chlorate

ClO₄⁻

perchlorate

CrO₄²⁻

chromate

Cr₂O₇²⁻

dichromate

MnO₄⁻

permanganate

NH₄⁺

ammonium

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