Question

The formula of chloride of metal m is mcl2 what will be the formula of its sulphate

Answer 1

The formula of chloride of metal m is mcl2.This show that the metal ion is M(+2) having +2 charge on it.When it bonds with sulphate ion which has equal but opposite charge , it's formula becomes MSO4.The charges cancel out each other.

Answer 2

The formula of its sulphate wil be $MSO_4$

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.  

In $MCl_2$, metal is having an oxidation state of +2 called as $M^{2+}$ cation and chlorine is an anion with oxidation state of -1 .Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral $MCl_2$.

For formation of sulphate, the metal having an oxidation state of +2 called as $M^{2+}$ cation is to combine with polyatomic anion sulphate $SO_4^{2-}$, their oxidation states are exchanged and written in simplest whole number ratios to give neutral $MSO_4$.

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