Sodium sulphate is soluble in water, whereas barium sulphate is sparin

1.	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 :When the hydration energy is more than the lattice energy, the salt is SOLUBLE in water and VICE versa.

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