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Please give the differences between Lyophobic and Lyophilic sols?
Lyophobic Sols
Lyophilic Sols
1) Colloidal particles are electrically charged
Particles may or may not be charged
2) Stability is due to electrical charge
Stability is due to adsorption dispersion medium.
3) Viscosity is similar to that of the dispersion medium.
Viscosity is much higher than that of the dispersion medium.
4) Surface tension is similar to that of dispersion medium.
Surface tension is often lower than that of the dispersion medium.
5) Exhibit Tyndall effect
These do not exhibit Tyndall effect.
6) The particles are easily detected by microscope.
The particles cannot be readily detected by the microscope.
7) Small quantities of electrolyte cause precipitation.
Small quantities of electrolyte have little effect. But high concentration causes coagulation.
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