Common Polyatomic Ions

A complete list of common polyatomic ions from the lecture notes, organized by their chemical names and formulas.

Acetate

$CH_3COO^-$ (or $C_2H_3O_2^-$)

Hypobromite

$$BrO^-$$

Bromite

$$BrO_2^-$$

Bromate

$$BrO_3^-$$

Perbromate

$$BrO_4^-$$

Hypochlorite

$$ClO^-$$

Chlorite

$$ClO_2^-$$

Chlorate

$$ClO_3^-$$

Perchlorate

$$ClO_4^-$$

Hydroxide

$$OH^-$$

Hydrogen carbonate (bicarbonate)

$$HCO_3^-$$

Hydrogen sulfate (bisulfate)

$$HSO_4^-$$

Hydrogen sulfite (bisulfite)

$$HSO_3^-$$

(Mono)hydrogen phosphate

$$HPO_4^{2-}$$

Dihydrogen phosphate

$$H_2PO_4^-$$

Hypoiodite

$$IO^-$$

Iodite

$$IO_2^-$$

Iodate

$$IO_3^-$$

Periodate

$$IO_4^-$$

Nitrite

$$NO_2^-$$

Nitrate

$$NO_3^-$$

Permanganate

$$MnO_4^-$$

Cyanide

$$CN^-$$

Cyanate

$OCN^-$ (or $CON^-$)

Thiocyanate

$SCN^-$ (or $CSN^-$)

Hypofluorite

$$FO^-$$

Fluorite

$$FO_2^-$$

Fluorate

$$FO_3^-$$

Carbonate

$$CO_3^{2-}$$

Chromite

$$CrO_3^{2-}$$

Chromate

$$CrO_4^{2-}$$

Dichromate

$$Cr_2O_7^{2-}$$

Manganate

$$MnO_4^{2-}$$

Silicate

$$SiO_3^{2-}$$

Oxalate

$$C_2O_4^{2-}$$

Peroxide

$$O_2^{2-}$$

Selenate

$$SeO_4^{2-}$$

Sulfite

$$SO_3^{2-}$$

Sulfate

$$SO_4^{2-}$$

Thiosulfate

$$S_2O_3^{2-}$$

Arsenite

$$AsO_3^{3-}$$

Arsenate

$$AsO_4^{3-}$$

Borate

$$BO_3^{3-}$$

Phosphite

$$PO_3^{3-}$$

Phosphate

$$PO_4^{3-}$$

Tripolyphosphate

$$P_3O_{10}^{5-}$$

Ammonium

$$NH_4^+$$