Give reason . the sulphate of Be & Mg are soluble in water .

Give reason . the sulphate of Be & Mg are soluble in water . 
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Answer :

The sulphates of the alkaline earth metals are all white solids and stable to heat. BeSO4, and MgSO4 are readily soluble in water; the solubility decreases from CaSO4 to BaSO4. The greater hydration enthalpies of Be2+ and Mg2+ ions overcome the lattice enthalpy factor and therefore their sulphates are soluble in water. 

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