What do you mean by colloidal solution and colloidal state? How do collodal solutions differ from true solutions with respect to dispersed particles size, homogenecity, Brownian movement and Tyndall effect.
Colloidal Solution is a heterogeneous mixture in which particle size of substance is intermediate of true solution and suspension i.e. between 1-1000 nm. Smoke from a fire is example of colloidal system in which tiny particles of solid float in air.
|
Property |
True Solution |
Colloidal Solutions |
|
Size of the particles |
1nm– 1000nm |
1000nm |
|
Nature |
Homogeneous |
Heterogeneous |
|
Filterability |
Particles of true Solution diffuse rapidly through filter paper as well as parchment paper. |
Colloidal particles pass through filter paper but not through parchment paper |
|
VisibilityParticles |
True Solution are not visible to naked eye. |
Colloidal particles are not seen to naked eye but can be studied through ultra microscope |
|
Tyndall effect |
Solution does not show Tyndall effect. |
Colloids shows Tyndall effect.
|
|
Brownian movement |
True solution does not show Brownian movement. |
Brownian movement shown in colloidal solution |
