Polyatomic Ions

Question 1

Molecular formula and charge: Hydronium Ion?

Answer 1

H3O+¹ plus one charge.

Question 2

Molecular formula and charge: Ammonium Ion?

Answer 2

NH4+¹ plus one charge.

Question 3

Molecular formula and charge: Hydroxide Ion?

Answer 3

OH¯¹ negative one charge.

Question 4

Molecular formula and charge: Nitrite Ion?

Answer 4

NO2-¹ negative one charge.

Question 5

Molecular formula and charge:
Nitrate Ion?

Answer 5

NO3-¹ negative one charge.

Question 6

Molecular formula and charge:
Hydrogen sulfate ion?

Answer 6

HSO4-¹ negative one charge.

Question 7

Molecular formula and charge:
Dihydrogen phosphate ion?

Answer 7

H2PO4-¹ negative one charge.

Question 8

Molecular formula and charge:
Cyanide ion?

Answer 8

CN-¹ negative one charge.

Question 9

Molecular formula and charge:
Permanganate ion?

Answer 9

MnO4-¹ negative one charge.

Question 10

Molecular formula and charge:
Chlorate ion?

Answer 10

ClO3-¹ negative one charge.

Question 11

Molecular formula and charge:
Hydrogen carbonate ion?

Answer 11

HCO3-¹ negative one charge.

Question 12

Molecular formula and charge:
Carbonate ion?

Answer 12

CO3-² negative two charge.

Question 13

Molecular formula and charge:
Chromate ion?

Answer 13

CrO4-² negative two charge.

Question 14

Molecular formula and charge:
Dichromate ion?

Answer 14

Cr2O7-² negative two charge.

Question 15

Molecular formula and charge:
Sulfite ion?

Answer 15

SO3-² negative two charge.

Question 16

Molecular formula and charge:
Sulfate ion?

Answer 16

SO4-² negative two charge.

Question 17

Molecular formula and charge:
Hydrogen phosphate ion?

Answer 17

HPO4-² negative two charge.

Question 18

Molecular formula and charge:
Phosphite ion?

Answer 18

PO3-³ negative three charge.

Question 19

Molecular formula and charge:
Phosphate ion?

Answer 19

PO4-³ negative three charge.

Question 20

Molecular formula and charge: Thiosulfate?

Answer 20

S2O3-2, negative 2 charge.