The measure of the amount of material that will dissolve in another material is called solubility. Solubility is usually expressed as the maximum amount of solute that can be dissolved in a given amount of solvent at a specific temperature and pressure. It is typically expressed in grams of solute per 100 grams of solvent, or in moles of solute per liter of solvent.

The solubility of a substance depends on several factors, including the nature of the solute and solvent, temperature, and pressure. Generally, the solubility of a substance increases with increasing temperature and decreasing pressure. The polarity of the solute and solvent also plays a role in solubility. Polar solutes tend to be more soluble in polar solvents, while nonpolar solutes tend to be more soluble in nonpolar solvents.