Question

xcl2 is a chloride of a metal X.state the formula of the sulphate and hydroxide of the metal x

Answer 1

Explanation:

The metal given is X and $XCl_2$ is the chloride. So, the valency of the metal would be 2. This is because, the valency of Cl is -1 and in the chloride, there are 2 $Cl^-$ non-metallic ions and the rest are that of the metal. Now because there are two atoms in the molecule, there should be a +2 charge to balance the -2 charge. Since, the chloride consists of one metal, the valency of the metal must be +2. The formula for metal sulphate should be $XSO_4$. The valency of metal X is +2 and that of sulphate we know is -2.

So, by cross valency method, we get the formula for metal sulphate as $XSO_4$ is given in the diagram in (a).  

For metal hydroxide, by cross valency method, we get the formula $X(OH)_2$ is given in the diagram in (b).