Which of the following compounds are readily soluble in water? (i) BeSO4 (ii) MgSO4 (iii) BaSO4 (iv) SrSO4
Which of the following compounds are readily soluble in water? (i) BeSO4 (ii) MgSO4 (iii) BaSO4 (iv) SrSO4

Answer: Option i) & ii)

Because their hydration enthalpies are higher than their lattice enthalpies, BeSO4 and MgSO4 are extremely soluble in water. CaSO4, SrSO4, and BaSO4 have low hydration enthalpies compared to their lattice enthalpies and are thus insoluble in water.