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

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The hydration energy of Na2SO4 is same as its lattice energy.

The lattice energy of BaSO4 is more than its hydration energy.

The lattice energy has no role to play in solubility.

The lattice energy of Na2SO4 is more than its hydration energy.

answer is B.

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Detailed Solution

when lattice energy is more than its hydrational energy, then salt is insoluble at normal temperatures

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