difference between sulphate, sulphite, sulphide

Sulphide:

The chemical formula for sulfate S^2-

Organic sulphides are compounds that are formed when sulphur bonds to two organic groups.

Inorganic sulphides are compounds that contain a negatively-charged sulphide ion. Example: Salt

Phosphine sulphide compounds are formed when sulphur bonds with an organic phosphine.

Sulfate:

The chemical formula for sulfate SO₄^2-

Sulphite:

Sulphite ions are the polyatomic ions which are formed by the combination of sulphur and oxygen atoms.