Question
What is the cause of Brownian movement observed in colloidal solution?
Solution
Answer:
The brownian movement has been explained to be due to the unblanced bombardment of the particles by the molecules of the dispersion medium.
When colloidal solutions are viewed under
a powerful ultramicroscope, the colloidal particles appear to be in a state of continuous zig-zag motion all over the field of view. This motion was first observed by the British botanist, Robert Brown, and is known as Brownian movement.
This motion isindependent of the nature of the colloid but depends on the size of the particels and viscosity of the solution samller the size and lesser the viscosity faster is the motion.
