Question

Sodium sulphate is soluble in water, whereas barium sulphate is sparingly soluble because 

(a) the hydration energy of sodium sulphate is more than its lattice energy 

(b) the lattice energy of barium sulphate is more than its hydration energy 

(c) the lattice energy has no role to play in solubility 

(d) the hydration energy of sodium sulphate is less than its lattice energy energy.

Answer 1

The correct option (a) the hydration energy of sodium sulphate is more than its lattice energy 

(b) the lattice energy of barium sulphate is more than its hydration energy 

Explanation:

Sodium sulphate is soluble in water, whereas barium sulphate is sparingly soluble because (i) The hydration energy of sodium sulphate is more than its lattice energy and (ii) The lattice energy of barium sulphate is more than its hydration energy.