Question:
Among the sulphates of alkaline earth metals, the solubilities of $\mathrm{BeSO}_{4}$ and $\mathrm{MgSO}_{4}$ in water, respectively, are :
Correct Option:
Solution:
$\mathrm{BeSO}_{4}$ and $\mathrm{MgSO}_{4}$ are readily soluble in water due to greater hydration enthalpies of $\mathrm{Be}^{2+}$ and $\mathrm{Mg}^{2+}$ ions, dominate over their lattice enthalpies and therefore their sulphates are highly soluble.
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