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Lyophilic sols are more stable than lyophobic sols. Why ?

Lyophilic sols are more stable than lyophobic sols.this is due to the fact that lyophilic colloids are extensively solvated, i.e. colloidal particles are covered by a sheath of the liquid in which they are dispersed.

Lyophilic colloids have a unique property of protecting lyophobic colloids. When a lyophilic sol is added to the lyophobic sol, the lyophilic particles form a layer around lyophobic particles and, thus, protect the latter from electrolytes.
Lyophilic colloids used for this purpose are called protective colloids.

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