Question

Explain why particles of a colloidal solution do not settle down when left undisturbed,

while in the case of a suspension they do

Answer 1

The particles of colloid are smaller than the particles of suspension, hence they do not settle down like suspension.

Answer 2

Particles of a colloidal solution do not settle down when left undisturbed, while in the case of a suspension they do because;

Explanation:

The size of the collidal particles are very minute. The state in which these particles remain is known as zig zag motion also percieved as brownian motion. Therefore force of gravity do not allow these particles to settle down. However, due to particles who remained in suspension have greater size , hence they settle down due to gravity.

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The size of collidal particle is in between ​

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