Solubility of the alkaline earth's metal sulphates in water decreases in the sequence:
Sr > Ca > Mg > Ba
Ba > Mg > Sr > Ca
Mg > Ca > Sr > Ba
Ca > Sr > Ba > Mg
As we discussed in the concept ID
Solubility of sulphates of alkaline metals -
Solubility in water decreases from Be to Ba
- wherein
Lattice energy is constant whereas hydration energy decreases from
Solubility of Sulphate in water decreases from Be to Ba
Option 1)
Sr > Ca > Mg > Ba
This option is incorrect
Option 2)
Ba > Mg > Sr > Ca
This option is incorrect
Option 3)
Mg > Ca > Sr > Ba
This option is correct
Option 4)
Ca > Sr > Ba > Mg
This option is incorrect