question_answer 28)

Why \[LiF\] is almost insoluble in water whereas \[LiCl\]soluble not only in water but also in acetone?

Answer:

Lattice energy of \[LiF\] is very large as both \[L{{i}^{+}}\]and \[{{F}^{-}}\]ions are small in size. \[LiF\]is an ionic compound and the crystal is very hard to break apart due to high lattice energy. Hence, \[LiF\]is almost insoluble in water. \[LiCl\]is partially covalent in nature due to polarisation of chloride ion by \[L{{i}^{+}}\]ion. Thus, it is soluble in water as well as in non-polar solvents.