Polyatomic Ions

Question 1

Ammonium

Answer 1

NH₄⁺

Question 2

Cyanide

Answer 2

CN^-

Question 3

Hydroxide

Answer 3

OH^-

Question 4

Nitrite

-ite indicates a low oxidation state.

Answer 4

NO₂^-

Question 5

Nitrate

-ate indicates a high oxidation state.

Answer 5

NO₃^-

Question 6

Chlorate

-ate indicates a high oxidation state.

Answer 6

ClO₃^-

Question 7

Perchlorate

per- & -ate indicates the very highest oxidation state.

Answer 7

ClO₄^-

Question 8

Acetate

-ate indicates a high oxidation state.

Answer 8

C₂H₃O₂^-

CH₃CO₂^-

Question 9

Bicarbonate
_{Hydrogen carbonate}

-ate indicates a high oxidation state.

Answer 9

HCO₃^-

Question 10

Carbonate

-ate indicates a high oxidation state.

Answer 10

CO₃^2-

Question 11

Permanganate

per & -ate indicates a high oxidation state.

Answer 11

MnO₄^-

Question 12

Sulfite

-ite indicates a low oxidation state.

Answer 12

SO₃^2-

Question 13

Sulfate

-ate indicates a high oxidation state.

Answer 13

SO₄^2-

Question 14

Chromate

-ate indicates a high oxidation state.

Answer 14

CrO₄^2-

Question 15

Phosphate

-ate indicates a high oxidation state.

Answer 15

PO₄^3-