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Colloids

A colloidal solution appears to be homogeneous but it is actually heterogeneous when viewed through a powerful microscope. A colloid is in-between a true solution and suspension. A colloid is a solution in which the size of the solute particles is bigger than that of a true solution, but smaller than that of a suspension.


Common examples of colloids
 

Dispersed phase

Dispersing medium

Type

Examples

Liquid

Gas

Aerosol

Fog, clouds, mist

Solid

Gas

Aerosol

Smoke, automobile exhaust

Gas

liquid

Foam

Shaving cream

Liquid

liquid

Emulsion

Milk, face cream

Solid

liquid

Sol

Milk of magnesia, mud

Gas

Solid

Foam

Foam, rubber, sponge

Liquid

Solid

Gel

Jelly, cheese, butter

Solid

Solid

Sol

Coloured gemstone, milky glass

 
 




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