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The method usually employed for the prec...

The method usually employed for the precipitation of a colloidal solution is

A

dialysis

B

condensation

C

diffusion through animal membrane

D

addition of electrolytes

Text Solution

Verified by Experts

The correct Answer is:
D
The presence of small amount of appropriate electrolytes in necessary for the stability of the colloids. However, when an electrolyte is added in larger concentration, the particles of the sol take up the ions which are oppositely charged and thus get neutralised. The neutral particles then start aggregating given particles of larger size which are then precipitated.
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