Difference Between Lyophilic and Lyophobic Sols

Lyophilic and Lyophobic Sols:

The following are the points of difference between lyophilic and lyophobic sols-

PropertyLyophilic SolsLyophobic Sols
Mode of PreparationThese can be easily prepared by simply shaking or warming the dispersed phase with the dispersion medium.These require some special methods for their preparation.
VisibilityThe particles cannot be easily detected even under an ultra-microscope.The particles can be easily detected under an ultra-microscope.
StabilityThese are self-stabilized.These are unstable and require a small amount of a stabilizing agent like gelatin to acquire stability.
ReversibilityThese are reversible in nature i.e. once precipitated can reform the colloidal sol by simply remixing with the dispersion medium.These are irreversible in nature i.e. once precipitated cannot form the colloidal sol by the simple addition of the dispersion medium.
Action of ElectrolytesThese require a large amount of electrolyte to undergo coagulation.These require a small amount of electrolyte to undergo coagulation.
PeptizationThese can be easily peptized.These cannot be easily peptized.
ElectrophoresisThese may or may not show electrophoresis.These always show electrophoresis.
Tyndall EffectThese do not exhibit the Tyndall effect and if at all these exhibits this effect, it is less distinct.These exhibit the Tyndall effect more distinctly.
ViscosityTheir viscosity is much higher than that of the medium.Their viscosity is almost the same as that of the medium.
Surface TensionTheir surface tension is usually lower than that of the dispersion medium.Their surface tension is nearly the same as that of the dispersion medium.
ChargeParticles may or may not carry a charge.Particles carry either positive or negative charge.
Concentration of the dispersed phaseA higher concentration of the dispersed phase is possible.Only a low concentration of the dispersed phase is possible.

Preparation of Lyophobic SolsClassification of Dyes on the basis of Application
Freundlich Adsorption IsothermMagnetic Field of Earth
Primary Cells- Dry Cell and Mercury CellMagnetic Field and Magnetic Lines of Force
Coordination Number, Void, Ionic Radii and Radius Ratio RuleAcids and Bases– Tamil Board

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