s-Block ElementsEasy
Question
Which of the following alkaline earth metal sulphates has hydration enthalpy higher than the lattice enthalpy ?
Options
A.CaSO4
B.BeSO4
C.BaSO4
D.SrSO4
Solution
Hydration energy varies inversely with size and in sulphates of alkaline earth metals lattice energy remains almost constant.
he order of size of alkaline earth metals is
Be2+ < Ca2+ < Sr2+ < Ba2+
Thus, the order of hydration energy is
Be2+ > Ca2+ > Sr2+ > Ba2+
Hence, BeSO4 has the hydration enthalpy higher than the lattice enthalpy.
he order of size of alkaline earth metals is
Be2+ < Ca2+ < Sr2+ < Ba2+
Thus, the order of hydration energy is
Be2+ > Ca2+ > Sr2+ > Ba2+
Hence, BeSO4 has the hydration enthalpy higher than the lattice enthalpy.
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