Question

$LiI$ is soluble in water but $LiF$ is not, why?

Answer 1

Due to small size of $F^{-}$ ions ,the lattic enthalphy of Lif is very high ,but the hydration enthalphy of it is very less.so lif is insoluble in water in Licl ,since $C{l}^{-}$is of large size and low lattice enthalpy and high hydration enthalpy so,it is soluble in water