Question

The solubility of metal halides depends on their nature, lattice enthalpy and hydration enthalpy of the individual ions. Amongst fluorides of alkali metals, the lowest solubility of $LiF$ in water is due to

• A. ionic nature of lithium fluoride
• B. high lattice enthalpy
• C. high hydration enthalpy for lithium ion
• D. low ionisation enthalpy of lithium atom

Answer 1

Answer: (B)

low solubility of $LiF$ in water is due to its high lattice enthalpy. Smaller $L{i}^{+}$ ion is stabilised by smaller $F^{-}$ ion.