# What factors influence the solubility of ionic solids in solvents?

An ionic solid is an infinite array of close-packed anions, and cations, bound together such that the interparticle forces of attraction between unlike charges, outweighs the interparticle forces of repulsion between like charges. Ionic particles are thus non-molecular species, where the ions are not free to move in the solid state. Because of this non-molecularity, they generally have HIGH melting points, and LOW vapour pressures, and very poor conductivities in the $\text{solid state}$ - so automatically we can eliminate three of the four given possibilities.