Common Polyatomic Ions

Vocabulary flashcards covering the names and chemical formulas of polyatomic ions listed in Table 5.4.

Ammonium

The polyatomic cation with the formula $NH_4^+$

Nitrite

The polyatomic ion with the formula $NO_2^-$

Nitrate

The polyatomic ion with the formula $NO_3^-$

Sulfite

The polyatomic ion with the formula $SO_3^{2-}$

Sulfate

The polyatomic ion with the formula $SO_4^{2-}$

Hydroxide

The polyatomic ion with the formula $OH^-$

Cyanide

The polyatomic ion with the formula $CN^-$

Phosphate

The polyatomic ion with the formula $PO_4^{3-}$

Carbonate

The polyatomic ion with the formula $CO_3^{2-}$

Hydrogen carbonate

The polyatomic ion with the formula $HCO_3^-$ (common name: bicarbonate)

Hypochlorite

The polyatomic ion with the formula $ClO^-$

Acetate

The polyatomic ion with the formula $C_2H_3O_2^-$ or $CH_3COO^-$

Peroxide

The polyatomic ion with the formula $O_2^{2-}$