1. Aerosol: A system of solid or liquid colloid when dispersed in the gas.
2. Sol: A colloidal system if the dispersed solid particles in liquid.
3. Emulsion: A colloidal system if the liquid particles dispersed in liquid or solid.
4. Emulsifier: A substance that can stabilize the emulsion, for example: soap and casein.
5. Gel: Colloids liofil a half stiff.
Dispersing medium occur if the gel is absorbed by the colloidal particles resulting in a rather dense colloid. Soap solution in a dense and hot water can be liquid, but if cold forming a rigid gel. If it is heated again will melt again.
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