A saturated solution is a solution that contains as much solute as can dissolve in a given solvent at a given temperature. An unsaturated solution is a solution that contains less solute than can dissolve in a given solvent at a given temperature.
Solutes differ in their solubility in a given solvent. Therefore, a saturated solution of one solute might contain more or less solute than a saturated solution of a different solute.
