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 Li 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 enthapy of lithium atom

Answer 1

Due to strong packing of

L

i

+

and

F

−

ion, lattice energy of LiF is higher than its hydration energy

Answer 2

Option B is the right answer