Difference Between Lyophilic and Lyophobic Colloids

S.No.	PROPERTY	LYOPHILIC COLLOIDS	LYOPHOBIC COLLOIDS
1.	Mode of preparation.	Forms easily by mere shaking or warming the dispersed phase with dispersion medium E.g. Gelatine in water.	Forms only by special methods. Example: AS2S3 in water.
2.	Size of particle	The particles are true molecules and are just bigger in size (Molecular colloids).	The particles are aggregates of thousands of molecules (Associated colloids).
3.	Nature	Reversible and once precipitated can readily pass into colloidal state by direct contact with dispersion medium because particles are solvent loving.	Irreversible and once precipitated can not easily pass into colloidal state because particles are solvent hating.
4.	Visibility	The particles are not easily detected even under ultra microscope.	The particles are easily detected under ultra microscope.
5.	Charge	The charge of particles depends upon PH of medium and it may be positive, negative or neutral.	The particles carry positive or negative charge.
6.	Stability	These are stable and are self – stabilized.	These are unstable and hence require traces of electrolyte for stabilisation.
7.	Action of electrolytes	Co-agulation can be brought about by the addition of large amount of electrolyte.	Co-agulation can be brought about by small amount of electrolyte.
8.	Viscosity	It is much higher than that of dispersion medium.	It is about same as that of dispersion medium.
9.	Surface	It is lower than dispersion medium	It is about same as that of dispersion medium.
10.	Tyndall effect	Less distinct	More distinct.
11.	Electrophoresis	The particles may or may not show electrophoresis.	The particles show electrophoresis.
12.	Hydration	The particles are heavily hydrated due to love for solvent.	The particles are not appreciably hydrated due to hate for solvent.
13.	Conc. Of dispersed phase	Higher concentrations of dispersed phase are possible.	Only low concentrations of dispersed phase are possible.
14.	Colligative property	They have relatively high osmotic pressure, depression in freezing point and high lowering in vapour pressure.	They have high osmotic pressure, less depression in freezing point, less elevation in boiling point and less lowering of vapour pressure.