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Lattice Energy

Which of the ...

Question

Which of the following alkaline earth metal sulphates has its hydration energy greater than its lattice energy?

A

C a S O_{4}

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B

B e S O_{4}

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C

B a S O_{4}

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D

S r S O_{4}

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Solution

The correct option is B $B e S O_{4}$
As we go down the group, the solubility of alkaline earth sulphates decreases. Since $B e S O_{4}$ is soluble in water, and $B a S O_{4}$ is not, $B e S O_{4}$ can be said to have more hydration energy.

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