1. Solubility is the quantity of a substance that dissolves in a certain quantity of water to produce a saturated solution.
In solubility equilibria calculations, it is usually expressed as grams of solute per liter of solution. Molar solubility is the number of moles of solute per liter of solution.
2. Solubility product is an equilibrium constant.
3. Molar solubility, solubility, and solubility product all refer to a saturated solution.