EXPLAIN why particles of colloidal solution do not settle down when kept undisturbed whereas particles of suspension do settle down?
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Colloid is a heterogeneous mixture. Their size of particles are too small. They are big enough to scatter beam of light and they are quite stable.
The particles of suspension can be seen through our naked eyes.they makes the path visible. And they are unstable
The particles of suspension can be seen through our naked eyes.they makes the path visible. And they are unstable
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In a colloidal solution the colloidal particles are small and they are being continuously hit upon by the molecules of depression medium.
It is very unlikely that the dispersed face particles will be hit upon by an equal force from all the sides.
Therefore there is a resultant force acting upon the colloidal particles in a particular direction.
And colloidal particles execute zigzag motion called Brownian movement.
Because of this the colloidal particles do not settle down under the influence of gravity.
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