Explain the following terms :
1. Electrophoresis
2. Coagulation
3. Dialysis
4. Tyndall effect
Explain the following terms :
1. Electrophoresis
2. Coagulation
3. Dialysis
4. Tyndall effect
1. Electrophoresis
The movement of colloidal particles towards oppositely charged electrodes in the presence of an electric field is called electrophoresis. If this movement is towards the cathode, the term used is cataphoresis.
2. Coagulation
The formation of aggregates or precipitates of colloidal particles by the addition of a suitable electrolyte is called coagulation.
For example; adding lemon juice to milk causes coagulation of milk protein.
3. Dialysis
The process of removing a dissolved substance from the colloidal solution by means of diffusion through a suitable membrane is called dialysis. Colloidal particles are prevented from passing through this membrane due to their bigger size.
4. Tyndall effect
When a beam of light is passed through a colloidal solution and the solution is viewed at right angles to the passage of light, they show a mild to strong opalescence, i.e., the path of the beam of light is illuminated. This phenomenon is called the Tyndall effect. This is caused due to scattering of light by colloidal particles.
1. Electrophoresis
The movement of colloidal particles towards oppositely charged electrodes in the presence of an electric field is called electrophoresis. If this movement is towards the cathode, the term used is cataphoresis.
2. Coagulation
The formation of aggregates or precipitates of colloidal particles by the addition of a suitable electrolyte is called coagulation.
For example; adding lemon juice to milk causes coagulation of milk protein.
3. Dialysis
The process of removing a dissolved substance from the colloidal solution by means of diffusion through a suitable membrane is called dialysis. Colloidal particles are prevented from passing through this membrane due to their bigger size.
4. Tyndall effect
When a beam of light is passed through a colloidal solution and the solution is viewed at right angles to the passage of light, they show a mild to strong opalescence, i.e., the path of the beam of light is illuminated. This phenomenon is called the Tyndall effect. This is caused due to scattering of light by colloidal particles.
