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Question

Sodium sulphate is soluble in water whereas barlum sulphate is sparingly soluble because
(a) the hydration energy of Na2SO4 is less than its lattice energy
(b) the hydration energy of Na2SO4 is more than its lattice energy
(c) the lattice energy of BaSO4 is more than its lattice energy.
(d) the lattice energy has no rolw to play in solubility.

A
a & b
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B
b & c
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C
c & d
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D
b & d
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Solution

The correct option is A b & c
  • (a) Incorrect :For greater solubility, hydration energy must be greater than lattice energy.
  • (b) Correct :For greater solubility, hydration energy must be greater than lattice energy.
  • (c) Correct : Greater lattice energy discourage dissolution of a salt.
  • (d) Incorrect : When a salt dissolve, energy is required to break the lattice, which comes from hydration process.

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