Question

M is a bivalent metal. Write down the steps to find the chemical formula of its compounds formed with the radicals, sulphate and phosphate.

Answer 1

Answer:Sulphate:-  MSO₄

             Phosphate:- M₃(PO₄)₂

Explanation:Since M is a bivalent metal, its Valency is +2.

Sulphate has a valency of -2 and so , its formula is SO₄²⁻.

Therefore the formula of sulphate of M is MSO₄(+2 and -2 are cancelled).

Phosphate has a valency of -3 and so , its formula is PO₄³⁻.

Therefore the formula of phosphate of M is M₃(PO₄)₂(Criss-cross method, valency gets exchanged as  subscript).