I would appreciate it if someone could explain to me why some salts are soluble in water while others such as lithium fluoride are not?
Thanks
All about the thermodynamics of it. The gibbs free energy of the process must be negative. So ideally a large enthalphy of solvation, a low lattice enthalpy and not a particularly positive entropy change for the process.
LiF has high Enthalpy of solvation and lattice but a very disfavourable entropy change