common polyatomic ions

Question 1

acetate (ethanoate)

Answer 1

CH3COO-

Question 2

ammonium

Answer 2

NH4+

Question 3

benzoate

Answer 3

C6H5COO-

Question 4

borate

Answer 4

BO3 3-

Question 5

carbide

Answer 5

C2 2-

Question 6

carbonate

Answer 6

CO3 2-

Question 7

hydrogen carbonate

Answer 7

HCO3-

Question 8

perchlorate

Answer 8

ClO4-

Question 9

chlorate

Answer 9

ClO3-

Question 10

chlorite

Answer 10

ClO2-

Question 11

hypochlorite

Answer 11

ClO- or OCl-

Question 12

chromate

Answer 12

CrO4 2-

Question 13

dichromate

Answer 13

Cr2O7 2-

Question 14

cyanide

Answer 14

CN-

Question 15

hydroxide

Answer 15

OH-

Question 16

iodate

Answer 16

IO3-

Question 17

nitrate

Answer 17

NO3-

Question 18

nitrite

Answer 18

NO2-

Question 19

oxalate

Answer 19

OOCCOO 2-

Question 20

hydrogen oxalate

Answer 20

HOOCCOO-

Question 21

permanganate

Answer 21

MnO4-

Question 22

peroxide

Answer 22

O2 2-

Question 23

persulfide

Answer 23

S2 2-

Question 24

phosphate

Answer 24

PO4 3-

Question 25

hydrogen phosphate

Answer 25

HPO4 2-

Question 26

dihydrogen phosphate

Answer 26

H2PO4-

Question 27

silicate

Answer 27

SiO3 2-

Question 28

sulfate

Answer 28

SO4 2-

Question 29

hydrogen sulfate

Answer 29

HSO4-

Question 30

sulfite

Answer 30

SO3 2-

Question 31

hydrogen sulfite

Answer 31

HSO3-

Question 32

hydrogen sulfide

Answer 32

HS-

Question 33

thiocyanate

Answer 33

SCN-

Question 34

thiosulfate

Answer 34

S2O3 2-