Is the ability of one substance to dissolve in another.

The ability for a substance to dissolve another lies with it's polarity.

Explanation: Substances can be polar, nonpolar, or ionic. Polar substances share covalent bonds between the atoms and molecules, therefore being able to dissolve other substances. Ionic compounds, such as table salt, emit ions (chemically charged atoms) which can break the molecular bonds of a certain substance, therefore dissolving it. Nonpolar substances do not have the molecular bonds to dissolve another substance. For example, if you tried to dissolve vegetable oil in water, the mixture would separate, the vegetable oil would not dissolve. The reasoning behind this is that water cannot dissolve oil because it is nonpolar. Nonpolar substances cannot be dissolved into polar or ionic substances due to their molecular bonds. All in all, the dissolving of substances all depends on the molecular structure of the solute and solvent you're working with.

Solubility

Explanation:

Solubility, or coefficient of solubility, is a physical property of matter that is always practically determined in the laboratory. It is related to the ability of a material, called a solute, to be dissolved by another, the solvent. In other words, solubility is the physical property (determined experimentally) that assesses the ability of one material to dissolve another.

nah.   i'm just sleepy.