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

Answer»

The hydration energy of sodium sulphate is more than its LATTICE energy
The lattice energy of barium sulphate is more than its hydration energy
The lattice energy has no role to play in solubility
The hydration energy of sodium sulphate is less than its lattice energy

Solution :`BaSO_(4)` is sparingly soluble in WATER because its hydration energy is LESSER than the lattice energy and thus ions are not SEPARATED from each other. On the contrary in `Na_(2)SO_(4)`, the hydration energy is more than its lattice energy. Thus ions are separated from each other and pass in solution state.


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