`MgSO_4` is soluble while `BaSO_4` is insoluble in `H_2O`. 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

C

Explanation

hydration energy of `Mg^(2+)` is greater than `Ba^(2+)`