Use electronegativities to predict which of the following compounds is the more soluble in water:

(a) LiI or MgI₂;

(b) CaS or CaO.

Exercise 2D.7

Compounds having bonds with a high covalent character tend to be less soluble in water than similar compounds that have low covalent character. Use electronegativities to predict which of the following compounds is the more soluble in water AlCl₃ or KCl; MgO or BaO.