Question

If a compound has the formula M2(SO4)3, What possible metal is M? Rewrite the compound by writing appropriate metal.​

Answer 1

Answer:

It can be any trivalent metal. For example:- Aluminium.

Explanation:

When you form an ionic compound by criss cross method...you will see that the charge on sulphate ion is -2 and so the corresponding charge must be +3 to satisfy the formula of the compound.

I hope it helps

Answer 2

The Possible metal is Aluminium. Formula of the compound is Al₂(SO₄)₃.

GIVEN

Formula of a compund M₂(SO₄)₃

TO FIND

Metal M.

SOLUTION

We can simply solve the above problem as follows;

We know that whenever a compound is formed the valencies of the elements are interchanged as subscript.

Also, It is given that Element M is a metal this means that the given compound is an ionic compound.

Valency of Metal M = +3 (positive charge because metals are cations)

Valency of sulphate ion = -2

Metals that has a valency of +3 are - Iron, Aluminium and chromium.

The valency of iron in iron sulphate is +2

So iron is not a possibility in this case.

Hence, The Possible metal is Aluminium. Formula of the compound is Al₂(SO₄)₃.

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