What happens when a saturated solution is cooled?

A solution in which no more solute can be dissolved at a given temperature is called saturated solution, and the amount of solute present in a saturated solution at a given temperature is called solubility. Solubility is directly proportional to temperature. So, when temperature decreases (i.e., when the saturated solution is cooled), solubility also decreases. Therefore, the solution becomes supersaturated.