Common Polyatomic Ions and Acid Nomenclature

Vocabulary practice flashcards covering names and chemical formulas for common polyatomic ions and oxyacids.

Acetate

A polyatomic ion with the chemical formula $C_2H_3O_2^-$.

Carbonate

A polyatomic ion with the chemical formula $CO_3^{2-}$.

Hydrogen carbonate (or bicarbonate)

A polyatomic ion with the chemical formula $HCO_3^-$.

Hydroxide

A polyatomic ion with the chemical formula $OH^-$.

Nitrite

A polyatomic ion with the chemical formula $NO_2^-$.

Nitrate

A polyatomic ion with the chemical formula $NO_3^-$.

Chromate

A polyatomic ion with the chemical formula $CrO_4^{2-}$.

Dichromate

A polyatomic ion with the chemical formula $Cr_2O_7^{2-}$.

Phosphate

A polyatomic ion with the chemical formula $PO_4^{3-}$.

Hydrogen phosphate

A polyatomic ion with the chemical formula $HPO_4^{2-}$.

Dihydrogen phosphate

A polyatomic ion with the chemical formula $H_2PO_4^-$.

Ammonium

A positively charged polyatomic ion with the chemical formula $NH_4^+$.

Hypochlorite

A polyatomic oxyanion of chlorine with the chemical formula $ClO^-$.

Chlorite

A polyatomic oxyanion of chlorine with the chemical formula $ClO_2^-$.

Chlorate

A polyatomic oxyanion of chlorine with the chemical formula $ClO_3^-$.

Perchlorate

A polyatomic oxyanion of chlorine with the chemical formula $ClO_4^-$.

Permanganate

A polyatomic ion with the chemical formula $MnO_4^-$.

Sulfite

A polyatomic oxyanion of sulfur with the chemical formula $SO_3^{2-}$.

Hydrogen sulfite (or bisulfite)

A polyatomic ion with the chemical formula $HSO_3^-$.

Sulfate

A polyatomic oxyanion of sulfur with the chemical formula $SO_4^{2-}$.

Hydrogen sulfate (or bisulfate)

A polyatomic ion with the chemical formula $HSO_4^-$.

Cyanide

A polyatomic anion with the chemical formula $CN^-$.

Peroxide

A diatomic polyatomic anion with the chemical formula $O_2^{2-}$.

$$HClO_4$$

Perchloric acid, the oxyacid formed from hydrogen and the perchlorate ion ($ClO_4^-$).