Polyatomic ions

NH_4⁺

Ammonium

NO_3^-

Nitrate

NO_2^-

Nitrite

OH^-

Hydroxide

CN^-

Cyanide

SCN^-

Thiocyanate

ClO_4^-

Perchlorate

ClO_2^-

Chlorite

ClO^-

Hypochlorite

C₂H₃O_2^-

Acetate

MnO_4^-

Permanganate

SO_4^2-

Sulfate

ClO_3^-

Chlorate

SO_3^2-

Sulfite

HSO_4^-

Hydrogen sulfate or Bisulfate

S₂O_3^2-

Thiosulfate

CO_3^2-

Carbonate

HCO_3^-

Hydrogen carbonate or bicarbonate

CrO_4^2-

Chromate

Cr₂O_7^2-

Dichromate

O_2^2-

Peroxide

C₂O_4^2-

Oxalate

PO_4^3-

Phosphate

HPO_4^2-

Hydrogen Phosphate

H₂PO_4^-

Dihydrogen Phosphate

HNO₃

Nitric Acid

HNO₂

Nitrous Acid

HOH

Water (not really an acid)

HCN

Hydrocyanic Acid

HSCN

Thiocyanic Acid

HClO₄

Perchloric Acid

HClO₃

Chloric Acid

HClO₂

Chlorous Acid

HClO

Hypochlorous Acid

HC₂H₃O₂

Acetic Acid

HMnO₄

Permanganic Acid

H₂SO₄

Sulfuric Acid

H₂SO₃

Sulfurous Acid

H_sS₂O₃

Thiosulfuric Acid

H₂CO₃

Carbonic Acid

H₂CrO₄

Chromic Acid

H₂O2

Hydrogen Peroxide (not really an acid)

H₂C₂O₄

Oxalic Acid

H₃PO₄

Phosphor