Question
Question: Going down in II A group, following properties decrease...
Going down in II A group, following properties decrease
A
Solubility of sulphates in H2O
B
Hydration energy
C
Thermal stability of carbonates
D
Ionic radius in water.
Answer
Solubility of sulphates in H2O
Explanation
Solution
(1) The sulphates of the alkaline earth metals are all white solid 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