Polyatomic Ions

Question 1

acetate

Answer 1

CH₃COO⁻

Question 2

bromate

Answer 2

BrO₃^-

Question 3

chlorate

Answer 3

ClO₃^-

Question 4

chlorite

Answer 4

ClO₂^-

Question 5

cyanide

Answer 5

CN^-

Question 6

dihydrogen phosphate

Answer 6

H₂PO₄^-

Question 7

hydrogen carbonate (bicarbonate)

Answer 7

HCO₃^-

Question 8

hydrogen sulfate (bisulfate)

Answer 8

HSO₄^-

Question 9

hydroxide (called hydroxyl when aqueous)

Answer 9

OH^-

Question 10

hypochlorite

Answer 10

ClO^-

Question 11

iodate

Answer 11

IO₃^-

Question 12

nitrate

Answer 12

NO₃^-

Question 13

nitrite

Answer 13

NO₂^-

Question 14

perchlorate

Answer 14

ClO₄^-

Question 15

permanganate

Answer 15

MnO₄^-

Question 16

thiocyanate (thiocyanato)

Answer 16

SCN^-

Question 17

carbonate

Answer 17

CO₃^2-

Question 18

chromate

Answer 18

CrO₄^2-

Question 19

dichromate

Answer 19

Cr₂O₇^2-

Question 20

manganate

Answer 20

MnO₄^2-

Question 21

oxalate

Answer 21

C₂O₄^2-

Question 22

peroxide*

Answer 22

O₂^2-

Question 23

sulfate

Answer 23

SO₄^2-

Question 24

sulfite

Answer 24

SO₃^2-

Question 25

phosphate

Answer 25

PO₄^3-

Question 26

ammonium

Answer 26

NH₄⁺

Question 27

hydronium

Answer 27

H₃O⁺

Question 28

Affix Guidelines

Answer 28

"ate" suffix is standard "per" prefix adds a O "ite" suffix has one less oxygen but same charge "hypo" prefix has two less "ide" suffix three less = usually none left