Which is soluble in water

Solubility: →BeSO4>MgSO4>CaSO4>SrSO4>BaSO4Hydration energy decreases solubility decreasesHydration energy ∝ solubilityIn case of large size anion  SO4-2,CO3-2 with small charge in cation size there is no considerable change in lattice energy and hence in this case solubility depends on the hydration energyHint :In general in all IA group and IIA group compounds except fluorides and hydroxides solubility down the group decreasesBut the two exception are carbonates and bicarbonate of IA group where solubility increases∴ BeSO4 is highly soluble in water