Adsorption - Colloidal particle

Colloidal particles attract and hold to their surfaces the molecules of various gases, vapors and other matter with which they come into contact. This phenomenon is called adsorption. Adsorption plays a very important  part in the character of the colloid .By adsorption the particles acquire an electric charge which  governs the stability of the colloid. The phenomenon of adsorption finds widespread application in food preparations. For e.g. a too salty soup stock may be made more palatable by the addition of egg white, which when cooked, will gather and hold the salt on to the surface of its particles and settle down to the bottom of the soup vessel.