SOLUTION, SUSPENSIONs, AND COLLOIDs.pptx

mixtures

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

2. Dispersed Particles and Dispersing Medium in Colloids 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.

3. 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.

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