Compound 1. Na₂SO₃

The TOTAL OXIDATION STATE of this compound is

• 0

• -1

• -2

• +2

Compound 1. Na₂SO₃

This compound contains the ion (SO₃)^?

The charge of (SO₃)^? is

• -2

• -1

• 0

• +2

Compound 1. Na₂SO₃

Oxygen has an oxidation state of

• -2

• +2

• -1

• +1

Compound 1. Na₂SO₃

Na has an oxidation state of

• +1, because Na is a Group 1 metal

• -1, Na is a Group 1 metal

• -2, Na is a Group 2 metal

• +2, Na is a Group 2 metal

Compound 1. Na₂SO₃

The oxidation state of S is

• +4

• +6

• +2

• -2

Compound 2. CaSO₄

The TOTAL OXIDATION STATE of this compound is

• 0

• -1

• -2

• +2

Compound 2. CaSO₄

This compound can be split in Ca^? and (SO₄) ^? . The charge of (SO₄) ^? is

• -2

• -3

• +1

• +2

Compound 2. CaSO₄

Ca has an oxidation state of

• +2, because Ca is a Group 2 metal

• +1, because Ca is a Group 1 metal

• +3, because Ca is a Group 3 metal

• -1, because Ca is a Group 17 metal

Compound 2. CaSO₄

Oxygen has an oxidation state of

• -2

• -3

• -1

• +1

Compound 2. CaSO₄

S has an oxidation state of

• +6

• -4

• +4

• -2