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Q.
Emulsion can be destroyed by
Surface Chemistry
Solution:
Emulsion is a colloidal system consisting of immiscible liquids.
For example, milk is an emulsion in which particles of liquid fat are dispersed in water. In common occurrence, however, one of the liquids is water and the other and oily substance insoluble in it. The suspended droplets are larger than the particles of the sols. It is because of the density differences between the phases being small. Emulsion droplets can be observed under an ordinary microscope and sometimes even with a magnifying lens.
Emulsions are stabilized by agents that form films at the surface of the droplets (e.g. soap molecules) or that impart to them a mechanical stability (e.g. colloidal carbon or bentonite). Unstable emulsions eventually separate into two liquid layers. Stable emulsions can be destroyed by inactivating or destroying the emulsifying agent. For eaxmple, by adding appropriate third substances or also by freezing or heating.