Common Polyatomic Ions

Vocabulary flashcards testing the chemical formulas and charges of common polyatomic ions listed in Table 3.5.

Acetate

Polyatomic ion with the chemical formula $C_2H_3O_2^-$

Carbonate

Polyatomic ion with the chemical formula $CO_3^{2-}$

Hydrogen carbonate (or bicarbonate)

Polyatomic ion with the chemical formula $HCO_3^-$

Hydroxide

Polyatomic ion with the chemical formula $OH^-$

Nitrite

Polyatomic ion with the chemical formula $NO_2^-$

Nitrate

Polyatomic ion with the chemical formula $NO_3^-$

Chromate

Polyatomic ion with the chemical formula $CrO_4^{2-}$

Dichromate

Polyatomic ion with the chemical formula $Cr_2O_7^{2-}$

Phosphate

Polyatomic ion with the chemical formula $PO_4^{3-}$

Hydrogen phosphate

Polyatomic ion with the chemical formula $HPO_4^{2-}$

Dihydrogen phosphate

Polyatomic ion with the chemical formula $H_2PO_4^-$

Ammonium

Polyatomic ion with the chemical formula $NH_4^+$

Hypochlorite

Polyatomic ion with the chemical formula $ClO^-$

Chlorite

Polyatomic ion with the chemical formula $ClO_2^-$

Chlorate

Polyatomic ion with the chemical formula $ClO_3^-$

Perchlorate

Polyatomic ion with the chemical formula $ClO_4^-$

Permanganate

Polyatomic ion with the chemical formula $MnO_4^-$

Sulfite

Polyatomic ion with the chemical formula $SO_3^{2-}$

Hydrogen sulfite (or bisulfite)

Polyatomic ion with the chemical formula $HSO_3^-$

Sulfate

Polyatomic ion with the chemical formula $SO_4^{2-}$

Hydrogen sulfate (or bisulfate)

Polyatomic ion with the chemical formula $HSO_4^-$

Cyanide

Polyatomic ion with the chemical formula $CN^-$

Peroxide

Polyatomic ion with the chemical formula $O_2^{2-}$