[Explained] What are Emulsions? What are the types?

 The colloidal dispersion which are of the liquid-liquid kind are called emulsions. An emulsion may be defined as:

The colloidal dispersion of two immiscible liquids in which one liquid acts as the dispersion medium and the other as dispersed phase is called an emulsion.

The preparation of emulsions and identification of its type can be done very easily at home.

Types of Emulsions

Depending upon the nature of dispersed phase, emulsions can be classified into the following two types:

Oil in Water (O/W) Type Emulsion

 

Oil in Water Type Emulsion
Oil in Water Type Emulsion

The oil in water type emulsion, the oil acts the dispersed phase while water acts as the dispersion medium. The most common of oil in water type emulsion is milk which contains liquid fat globules dispersed in water.

Water in Oil (W/O) Type Emulsion

 

Water in Oil Type Emulsion
Water in Oil Type Emulsion

In water in oil type emulsion, water acts as the dispersed phase while oil acts the dispersion medium. This type of emulsion is also known as oil emulsion. Cod liver oil emulsion is a typical example of this type of emulsion in which water is dispersed in cod liver oil.

Emulsions find various applications in many industries and systems.

 

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