Common Polyatomic Ions

Question 1

Perchlorate

Answer 1

ClO₄^-

Question 2

Chlorate

Answer 2

ClO₃^-

Question 3

Chlorite

Answer 3

ClO₂^-

Question 4

Hypochlorite

Answer 4

ClO^-

Question 5

Sulfate

Answer 5

SO₄^2-

Question 6

Sulfite

Answer 6

SO₃^2-

Question 7

Hyposulfite

Answer 7

SO₂^2-

Question 8

Nitrate

Answer 8

NO₃^-

Question 9

Nitrite

Answer 9

NO₂^-

Question 10

Phosphate

Answer 10

PO₄^3-

Question 11

Phosphite

Answer 11

PO₃^3-

Question 12

Perbromate

Answer 12

BrO₄^-

Question 13

Bromate

Answer 13

BrO₃^-

Question 14

Bromite

Answer 14

BrO₂^-

Question 15

Hypobromite

Answer 15

BrO^-

Question 16

Carbonate

Answer 16

CO₃^2-

Question 17

Bicarbonate

Answer 17

HCO₃^-

Question 18

Bisulfate

Answer 18

HSO₄^-

Question 19

Biphosphate

Answer 19

HPO₄^2-

Question 20

Triphosphate

Answer 20

H₂PO4^-

Question 21

Acetate

Answer 21

CH₃COO^-

C₂H₃O₂^-

Question 22

Oxalate

Answer 22

OOCCOO^2-

C₂O₄^2-

Question 23

Chromate

Answer 23

CrO₄^2-

Question 24

Permanganate

Answer 24

MnO₄^-

Question 25

Dichromate

Answer 25

Cr₂O₇^2-

Question 26

Cyanide

Answer 26

CN^-

Question 27

Thiocyanate

Answer 27

SCN^-