Polyatomic Ions

Question 1

C₂H₃O_2-

Answer 1

acetate

Question 2

CO₃^2-

Answer 2

carbonate

Question 3

HCO_3-

Answer 3

bicarbonate

Question 4

OH^-

Answer 4

hydroxide

Question 5

NO₂^-

Answer 5

nitrITE

Question 6

NO₃^-

Answer 6

nitrATE

Question 7

CrO₄^2-

Answer 7

chromate

Question 8

Cr₂O₇^2-

Answer 8

dichromate

Question 9

PO₄^3-

Answer 9

phosphate

Question 10

HPO₄^2-

Answer 10

hydrogen phosphate

Question 11

H₂PO₄^-

Answer 11

dihydrogen phosphate

Question 12

NH₄⁺

Answer 12

ammonium

Question 13

ClO^-

Answer 13

hypochlorITE

Question 14

ClO₂^-

Answer 14

chlorITE

Question 15

ClO₃^-

Answer 15

chlorATE

Question 16

ClO₄^-

Answer 16

PERchlorATE

Question 17

SO₃^2-

Answer 17

sulfITE

Question 18

HSO₃^-

Answer 18

bisulfITE

Question 19

SO₄^2-

Answer 19

sulfATE

Question 20

HSO₄^-

Answer 20

bisulfATE

Question 21

CN^-

Answer 21

cyanide

Question 22

IO₃^-

Answer 22

iodATE

Question 23

BrO₃^-

Answer 23

bromATE

Question 24

-ate is bigger than -ite

Answer 24

any compound with the suffix -ate has one more oxygen than the -ite counterpart

ex) nitrite (NO₂-) vs nitrate (NO₃-)

Question 25

hypo- is smaller than -ite

Answer 25

think hypo- meaning low or under; the compound with hypo- as the prefix will **have one LESS oxygen** than its -ite counterpart ex) hypochlorite (ClO^-) vs chlorite (ClO^2-)

Question 26

per- is bigger than -ate

Answer 26

per- prefix compounds have **one more oxygen** than their -ate counterparts ex) perchlorate (ClO₄^-) vs chlorate (ClO₃^-)

Question 27

hypo- < -ite < -ate < per-

Answer 27

ex) ClO^- < ClO₂^- < ClO₃^- < ClO₄^- hypochlorite, chlorite, chlorate, perchlorate