`MgSO_(4)` is soluble while `BaSO_(4)` is insoluble in `H_(2)O`. This is because :

Options

A. Lattice energy of `BaSO_(4)` is greater than `MgSO_(4)`
B. `BaSO_(4)` is more covalent than `MgSO_(4)`
C. Hydration energy of `Mg^(2+)` is greater than `Ba^(2+)`
D. Lattice energy of `MgSO_(4)` is greater than `BaSO_(4)`

Answer

A, C

Explanation

Hydration energy `prop` charge on the ion , Hydration energy `prop (1)/(("size of the ion"))`