Solubility

saturated solution

A solution is said to be saturated when no more solute can dissolve in the given amount of solvent at a particular temperature. If a solid crystal of the solute is placed in the saturated solution it will neither grow nor will it decrease in size.  

 

The rate at which the solute particles stick to the crystal (precipitate) is the same as the rate at which the particles leave the crystal (dissolve).