Colloids, Classifications and Examples of each phases

Colloids is a mixture in which one substance is divided into small particles called colloidal particles and dispersed throughout a second substance. The substances are present as larger particles than those found in solution, but are too small to be seen with a microscope.

Colloid particles themselves are called Dispersed phase. Three forms in which all matter exists are solid, liquid or gas. Colloidal systems can be any combination of these states.

The medium in which colloidal particles are suspended/dispersed/distributed is called Dispersion Medium.

Classification and examples of colloids:

Medium/Phase

Dispersed phase

Gas

Liquid

Solid

Dispersion Medium

Gas

No such colloids are known
Helium and xenon are known to be immiscible under certain conditions.

Liquid aerosol
Examples: fog, clouds, mist, hair sprays

Solid aerosol
Examples: smoke, ice cloud, atmospheric particulate matter

Liquid

Foam
Example: whipped cream, shaving cream

Emulsion
Examples: milk, mayonnaise, hand cream; latex

Sol
Examples: milk (protein fraction), pigmented ink, blood

Solid

Solid foam
Examples: aerogel, styrofoam

Gel
Examples: agar, gelatin, jelly

Solid sol
Example: cranberry glass

 

Post By : Pankaj 25 Dec, 2018 2333 views Chemistry