Na2SO4 is soluble in water white BaSO4 is insoluble. Which of the reason is correct about the above statement.
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a
Lattice energy of BaSO4 exceeds its hydration energy
b
Hydration energy of BaSO4 exceeds its lattice energy.
c
The solubility in H2O of a compound depends only on its hydration energy.
d
The solubility in H2O of a compound depends only on its lattice energy.
answer is A.
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Detailed Solution
For ionic compound if lattice energy ΔuH⊙> hydration energy ΔhydH⊖ the compound is insoluble and vice versa. Na2SO4,ΔuH⊖<Δhyd H⊖, thus it is soluble in H2O. For BaSO4,ΔuH⊖>Δhyd H⊖, thus it is insoluble in H2O.