Distinction between lyophilic and lyophobic sols

Distinction between lyophilic and lyophobic sols

Property

Lyophilic sols (suspensoid)

Lyophobic sols (Emulsoid)

Surface tension

Lower than that of the medium

Same as that of the medium

Viscosity

Much higher than that of the medium

Same as that of the medium

Reversibility

Reversible

Irreversible

Stability

More stable

Less stable

Visibility

Particles can’t be detected even under ultramicroscope

Particles can be detected under ultramicroscope.

Migration

Particles may migrate in either direction or do not migrate in an electric field because do not carry any charge.

Particles migrate either towards cathode or anode in an electric field because they carry charge.

Action of electrolyte

Addition of smaller quantity of electrolyte has little effect

Coagulation takes place

Hydration

Extensive hydration takes place

No hydration

Examples

Gum, gelatin, starch, proteins, rubber etc.

Metals like Ag and Au, hydroxides like , metal sulphides like  etc.

Get practice papers FREE

BOOK A FREE TRIAL
Copyright © 2010-2011 www.emedicalprep.com. All rights reserved.
Skip to toolbar