Ammonium ion

NH₄ ⁺

Hydroxide ion

OH^-

Cyanide ion

CN^-

Acetate ion

C₂H₃O₂ ^- or CH₃COO^-

Nitrite/Nitrate

NO₂ ^-/NO₃ ^-

Sulfite/Sulfate

SO₃ ^2-/SO₄ ^2-

Phosphate

PO₄ ^3-

Carbonate

CO₃ ^2-

Hydrogen sulfite ion

HSO₃ ^-

Hydrogen sulfate ion

HSO₄ ^-

Hydrogen phosphite ion

HPO₃ ^2-

Dihydrogen phosphite ion

H₂ PO₃ ^-

Hydrogen phosphate ion

HPO₄ ^2-

Dihydrogen phosphate ion

H₂PO₄ ^-

Hydrogen carbonate ion, or bicarbonate ion

HCO₃ ^-

Perchlorate ion

ClO₄ ^-

Chlorate ion

ClO₃ ^-

Chlorite ion

ClO₂ ^-

Hypochlorite ion

ClO^-

Perbromate ion

BrO₄ ^-

Bromate ion

BrO₃ ^-

Bromite ion

BrO₂ ^-

Hypobromite ion

BrO^-

Periodate ion

IO₄ ^-

Iodate ion

IO₃ ^-

Iodite ion

IO₂ ^-

Hypoiodite ion

IO^-

Chromate ion

CrO₄ ^2-

Dichromate ion

Cr₂O ₇ ^2-

Permanganate ion

MnO₄ ^-