Why lyophilic colloids are more stable than lyophobic colloids?
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Solution
Lyophilic & Lyophobic:
Lyo means liquid and philic means loving. So, lyophilic is liquid loving in nature.
Any colloids that are loving liquid are called lyophilic.
Example of lyophilic colloids is starch, protein and gum.
Lyo means liquid and phobic means hating. So, lyophobic means liquid hating.
Any colloids that are hating the liquid s called lyophobic.
Examples of lyophobic colloids are metal, metal sulphides and oxides.
Stabilty of lyophilic:
Lyophilic sols are more stable than lyophobic sols. This is because lyophilic colloids are highly solvated, which means that colloidal particles are enclosed in a sheath of the liquid in which they are distributed.
When a lyophilic sol is mixed with a lyophobic sol, the lyophilic particles form a protective layer around the lyophobic particles, shielding them from electrolytes.
The disperse phase of lyophilic colloids has a high affinity for the dispersion medium, whereas the disperse phase of lyophobic colloids has a low affinity for the dispersion medium.
