Emulsions : When a liquid forms a colloidal solution by the dispersion in another liquid is called an emulsion.
Therefore, a colloidal solution in which both dispersed phase and dispersion medium are liquid is called an Emulsion.
exam:- when olive oil and water are mixed then oil gets dispersed in water in the form of small droplets thus forming an emulsion.
Types of emulsion :-
A)Oil in water :In this small droplets of oil are dispersed in water.
exam:- milk(liquid fat in water), vanishing cream.
B) Water in oil :In this emulsion, the droplets of water are dispersed in the oil.
exam:- cream, cold cream.
Preparation of emulsion :
When two immiscible liquids are stirred vigorously, an emulsion is formed. This emulsion is unstable. To obtain the stable emulsion a third substance, known as emulsifying agent is added.
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