chemistry

BETWEEN THE LYOPHILIC SOLS AND LYOPHOBIC SOLS

S.No.	Property	Lyophilic sols	Lyophobic sols
1.	Ease of preparation	Lyophilic sols can be prepared easily by simply shaking the lyophilic colloids with the dispersion medium	Lyophobic sols cannot be obtained simply by shaking the lyophobic colloids with the medium. They can be obtained only by using special techniques.
2.	Hydration	They are heavily hydrated.	They are not much hydrated.

3.	Stability	Due to hydration, they are quite stable and are not easily coagulated.	They are less stable and get coagulated by heating, by agitating or on addition of small amount of an electrolyte.
4.	Reversibility	Reversible	Irreversible
5.	Visibility	The dispersed particles are neither visible nor detected easily even under ultra-microscope.	The dispersed particles, through not visible can be detected easily under ultra microscope.
6.	Viscosity	The viscosity is much higher than that of the dispersion medium.	The viscosity is almost the same as that of the dispersion medium.
7.	Surface tension	The surface tension is usually lower than that of the dispersion medium	The surface tension is nearly the same as that of the dispersion medium.
8.	Charge on particles	The dispersed particles have little or no charge on them.	The dispersed particles carry a definite charge which is either positive or negative.
9.	Migration of particles in an electric field	The dispersed particles may migrate in either direction or may not migrate at all.	Depending upon the nature of charge present, the dispersed particles migrate in a particular direction.