The document explains the concepts of colloids, detailing dispersed particles and dispersing mediums. It describes dispersed particles as small, non-visible components of colloids that scatter light, with examples including fat globules in milk. It also categorizes types of colloids based on the phase of the dispersed particles and the dispersing medium, providing examples for each type.

1. SOLUTION,
SUSPENSION, AND
COLLOID
HELLO, GRADE 6!

3. Dispersed Particles and Dispersing Medium in Colloids
1.Dispersed Particles:
• Definition: Dispersed particles are the small particles or
droplets that are dispersed throughout a colloidal system.
These particles are typically in the size range of 1 nanometer
to 1 micrometer.
• Characteristics: They are not visible to the naked eye and do
not settle out over time. They are large enough to scatter
light, which makes colloids appear cloudy or opaque.
• Examples: In a milk colloid, the dispersed particles are fat
globules; in a smoke colloid, they are tiny solid particles
suspended in the air.

4. 2. Dispersing Medium:
• Definition: The dispersing medium is the substance
in which the dispersed particles are distributed. It is
the continuous phase of the colloidal system.
• Characteristics: The dispersing medium can be a
solid, liquid, or gas. It determines the state of the
colloid and interacts with the dispersed particles.
• Examples: In the case of milk, the dispersing
medium is water. In a gel, the dispersing medium is
typically a liquid that forms a gel network.

5. Types of Colloids Based on Dispersed Phase and Dispersing Medium
1.Sol: Solid particles dispersed in a liquid.
Example: Paint, blood.
2.Gel: Liquid dispersed in a solid.
Example: Gelatin, jelly.
3.Emulsion: Liquid droplets dispersed in another liquid.
Example: Milk (fat in water), mayonnaise (oil in water).
4.Foam: Gas bubbles dispersed in a liquid or solid.
Example: Whipped cream (air in cream), foam rubber (air in rubber).
5.Aerosol: Solid or liquid particles dispersed in a gas.
Example: Smoke (solid particles in air), fog (liquid droplets in air).