Select the most appropriate explanation of the following observation on solubility: "Hydrogen chloride, HCl, is very soluble in water."
Water is a polar solvent, and it promotes the ionization of many polar molecules.
Opposites attract, that is, polar solutes dissolve in non-polar solvents and vice-versa.
Water promotes the dissociation of many ionic solids.
Gases that interact only slightly with solvents dissolve freely.
Relatively light molecules are generally more soluble in water than heavier molecules.