The s-Block Elements

The s-Block Elements

Question

Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice enthalpy?

  • CaSO4

  • BeSO4

  • BaSO4

  • SrSO4

Answer

B.

BeSO4

Hydration energy basically depends on the size of an atom.
(i) Smaller the size atom greater the hydration energy.
(ii) Be is small in size thus have greater hydration energy.

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