Solubility of the alkaline earth metal sulpha | vedclass

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Question

(C) The solubility of alkaline earth metal sulphates decreases down the group. The order is $Mg > Ca > Sr > Ba$. The magnitude of the lattice energy r

Vedclass · Accepted Answer

$Mg > Ca > Sr > Ba$

Vedclass · Answer

(C) The solubility of alkaline earth metal sulphates decreases down the group. The order is $Mg > Ca > Sr > Ba$. The magnitude of the lattice energy remains almost constant because the size of the sulphate ion is very large compared to the cations. However,the hydration energy decreases significantly from $Be^{2+}$ to $Ba^{2+}$ as the size of the cation increases down the group. Since hydration energy decreases faster than lattice energy,the overall solubility decreases down the group.

Solubility of the alkaline earth metal sulphates in water decreases in the sequence

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