Polyatomic Ions

 

 

Cyanide

 

 

CN– 

 

 

Thiocyanate

 

 

SCN

 

 

Hydroxide

 

 

OH

 

 

Nitrate

 

 

NO3

 

 

Nitrite 

 

 

NO2

 

 

Acetate

CH3COO

or

C2H3O2

 

 

Permanganate

 

 

MnO4

 

 

Perchlorate

 

 

ClO4

 

 

Chlorate

 

 

ClO3

 

 

Chlorite

 

 

ClO2

 

 

Hypochlorate

 

 

ClO

 

 

Perbromate

 

 

BrO4

 

 

Bromate

 

 

BrO3

 

 

Bromite

 

 

BrO2

 

 

Hypobromite

 

 

BrO

 

 

Bromide

 

 

Br

 

 

Periodate

 

 

IO4

 

 

Iodate

 

 

IO3

 

 

Iodite

 

 

IO2

 

 

Hypoiodite

 

 

IO

 

 

Iodide

 

 

I

Hydrogencarbonate

or

Bicarbonate

 

 

HCO3

Hydrogensulfate

or 

Bisulfate

 

 

HSO4

 

 

Carbonate

 

 

CO32-

 

 

Oxalate

 

 

C2O42-

 

 

Sulfate

 

 

SO42-

 

 

Thiosulfate

 

 

S2O32-

 

 

Sulfite

 

 

SO32-

 

 

Phthalate

 

 

C8H4O42-

 

 

Chromate

 

 

CrO42-

 

 

Dichromate

 

 

Cr2O72-

 

 

Peroxide

 

 

O22-

 

 

Phosphate

 

 

PO43-

 

 

Phosphite

 

 

PO33-

 

 

Arsenate

 

 

AsO43-

 

 

Ammonium

 

 

NH4+

 

 

Hydronium

 

 

H3O+

 

 

Mercury(I)

 

 

Hg22+

x

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