Arrange `Be(OH)_2, Ba(OH)_2 & Ca(OH)_2` in order of increasing solubility in water and explain the order.

Explanation

Among the alkaline earth metal hydroxides having common anion, the cationic radius influence the lattice enthalpy. Since the lattice enthalpy decreases much more than the hydration enthalpy with increasing cationic size, the solubility increases on moving down the group. `{:(" "(Be(OH)_2,Ca(OH)_2,Be(OH)_2)),(("_____""Solubility increases"to)):}`