Sodium sulphate is soluble in water but barium sulphate is insoluble because

Options

A. The hydration energy of `Na_2SO_4` is more than its lattice energy
B. The lattice energy of `BaSO_4` is more than its hydration energy
C. The lattice energy has no role to play in solubility
D. Both (a) and (b)

Answer

D

Explanation

The hydration energy of `Na_2SO_4` is more than its lattice energy so sodium sulphate is soluble in water. Whereas the hydration energy of `BaSO_4` is less than its lattice energy so it is insoluble in water.