A) Be > Ca > Mg > Ba > Sr
B) Mg > Be > Ba > Ca > Sr
C) Be > Mg > Ca > Sr > Ba
D) Mg > Ca > Ba > Be > Sr
Correct Answer: C
Solution :
Be > Mg > Ca > Sr > Ba. The size of the \[SO_{4}^{2-}\]ion is very big (approx. 3\[\overset{\text{o}}{\mathop{\text{A}}}\,\]). Therefore, as the size of the cation increases, their hydration energies decrease more rapidly than their lattice energies. Consequently the solubilities of sulphates decrease down the group.
You need to login to perform this action.
You will be redirected in
3 sec
