38 Polyatomics (from charges on ions and oxidation numbers handout)

Chem-120

Benzoate

C6H5COO-

Acetate

CH3COO-

Sulfate

SO4^2-

Sulfite

SO3^2-

Hydrogen phosphate

HPO4^2-

Chromate (yellow)

CrO4^2-

Dichromate (orange)

Cr2O7^2-

Phosphate

PO4^3-

Phosphite

PO3^3-

Arsenate

AsO4^3-

Hypochlorite

ClO-

Borate

BO3^3-

Chlorite

ClO2-

Chlorate

ClO3-

Hyperchlorate

ClO4-

Hypoiodite

IO-

Iodite

IO2-

Peroxide (1- for each oxygen)

O2^2-

Hydroxide

OH-

Nitrate

NO3-

Hypobromite

BrO-

Nitrite

NO2-

Bromite

BrO2-

Bromate

BrO3-

Cyanide

CN-

Permanganate (purple)

MnO4-

Hyperbromate

BrO4-

Hydrogen carbonate (bicarbonate)

HCO3-

Hydrogen sulfate (bisulfate)

HSO4-

Hydrogen sulfite (bisulfite)

HSO3-

Dihydrogen phosphate

H2PO4-

Iodate

IO3-

Periodate

IO4-

Oxalate

C2O42-

Thiocyanate

SCN-

Ammonium ion

NH4+

Thiosulfate

S2O3^2-

Citrate

C6H5O7^3-