S Block Elements

Question

Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice
enthalpy?

Accepted Answer

Option A. In alkaline earth metals, ionic size increases down the group. The lattice energy remains constant because sulphate ion is so large, so that small change in cationic size does not make any difference. On moving down the group the degree of hydration of metal ions decreases very much leading to decrease in solubility.

More on S Block Elements

S Block Elements

More on S Block Elements