S Block Elements Question 100

Question: The order solubility in water of alkaline earth metal sulphates down the group is $ Be>Mg>Ca>Sr>Ba $ . This is due to increases in

Options:

A) ionization energy

B) melting point

C) coordination number

D) All of these

Show Answer

Answer:

Correct Answer: C

Solution:

[c] In crystalline sulphates, the coordination number of the ions increases from $ Be $ to $ Ba $ and so also the lattice energy hence solubility in $ H_2O $ decreases.