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Q.
Solubility of the alkaline earth's metal sulphates in water decreases in the sequence
NTA AbhyasNTA Abhyas 2022
Solution:
On moving down the group size of cation increases so hydration energy decreases and solubility decreases as lattice energy dominates over hydration energy.
Due to very small size of $Mg^{+ 2},Mg^{+ 2}$ shows maximum hydration energy and $MgSO_{4}$ is more soluble here.
