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Colloids

Colloids are non-uniform mixtures where particles do not settle but remain dispersed throughout the medium, exhibiting properties of both liquids and solids. There are two components - the dispersed phase consisting of particles larger than molecules but smaller than what can be seen, distributed throughout the dispersion medium. The four main types of colloids are sols, emulsions, foams, and aerosols, depending on whether the dispersed and dispersion components are solid, liquid or gas. Colloids have important uses in industries like dialysis, pottery, fibers, and pharmaceuticals.

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102 views1 page

Colloids

Colloids are non-uniform mixtures where particles do not settle but remain dispersed throughout the medium, exhibiting properties of both liquids and solids. There are two components - the dispersed phase consisting of particles larger than molecules but smaller than what can be seen, distributed throughout the dispersion medium. The four main types of colloids are sols, emulsions, foams, and aerosols, depending on whether the dispersed and dispersion components are solid, liquid or gas. Colloids have important uses in industries like dialysis, pottery, fibers, and pharmaceuticals.

Uploaded by

jellyB Rafael
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© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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3 Types of Mixture

SOLUTION
COLLOID
SUSPENSION
Colloids and Its Characteristics
Colloid is a mixture that exhibits both properties
of liquid and solid and it is called a non-uniform
mixture because the particles do not settle but remain
dispersed throughout the medium.

- To be classified as colloid substance in dispersed


phase must be larger than the size of a molecule
but smaller than what can be seen by the naked eye.
2 COMPONENTS OF COLLOID
DISPERSED PHASE
- The substance being distributed throughout the mixture
- Example MILK (SOLUTE)
DISPERSAL MEDIUM
- The substance throughout which the dispersed phased is distributed.
- Example WATER (SOLVENT)
TYPES OF COLLOID
SOL – a colloidal suspension with solid particles in a liquid
- SOLID + LIQUID = SOL
EMULSION – formed between 2 liquids
- LIQUID + LIQUID = EMULSION
FOAM – is formed when many gas particles are trapped in a liquid
- GAS + LIQUID = FOAM
AEROSOL – contains small particles of liquid or solid dispersed in a gas
- LIQUID or SOLID + GAS = AEROSOL
Importance and uses of colloids
1. Colloids used in dialysis
2. Colloids are used in pottery
3. Colloids are used in the artificial fiber industry.
4. Colloids are used in the pharmaceutical industry

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