LiF is soluble in water because the polar water molecules attack and hydrate the ions as shown above. It is not soluble in nonpolar liquids because nonpolar molecules show no attraction for the ions and are of no help in pulling the crystal structure apart.

Many salts are soluble in water but almost none are soluble in nonpolar liquids such as benzene, gasoline, or carbon tetrachloride, .

You can drop a small amount of table salt, NaCl, into a glass of water and see the crystals dissolve and disappear quickly. But crush the salt crystals as fine as you like, and after being mixed with olive oil (nonpolar) they will remain as a white, insoluble powder.