DIFFERENCE BETWEEN LYOPHOBIC & HYOPHILIC SOLUTION LYOPHOBIC HYOPHILIC They are irreversible solutions Reversible solutions Less stable and get coagulated, by Quite stable, are not easily heating or by agitating coagulated by electrolysis Not much hydrated Highly hydrated Cannot prepared directly, prepared Prepared easily by directly mixing by special method only with the liquid dispersion medium Viscosity is almost same as that of Viscosity is higher than that of the medium medium Surface tension is nearly same as Surface tension is usually lower than that of dispersion medium that of the dispersion medium Solution generally formed by metals, Usually formed by organic their sulphides etc. substances like starch, gum, proteins (inorganic substances) etc. They carry either +ve or-ve charge Carry no charge CLASSIFICATION – DEPENDING UPON MOLECULAR SIZE Types of colloids:- Multi molecular colloids:-When on dispersion of a substance in the dispersion medium, a large number of atoms or smaller molecules of the substance(< 1mm) aggregate together to form species having size in colloidal range, the species thus formed are called multimolecular colloids. E.g. a gold solution consists of particles of various sizes which are clusters of various gold atoms. A solution of sulphur consists of colloidal particles which are aggregates of S8 molecules. Macro molecular colloids:- These are the substances which on dissolution form solution in which the dispersed phase have the size of particles of colloidal range. Such substances are called macromolecular colloids. E.g. colloidal solution of starch, protein, cellulose, carbohydrates etc. These solutions are quite stable & versatile with True solution. Manmade: Polythene, Nylon, synthetic rubber, etc. Associated colloids:- These are substances which when dissolved in the medium behave as normal electrolyte at low concentration but behave as colloid at higher concentration.
DIFFERENCE BETWEEN LYOPHOBIC & HYOPHILIC SOLUTION LYOPHOBIC HYOPHILIC They are irreversible solutions Reversible solutions Less stable and get coagulated, by heating or by agitating Quite stable, are not easily coagulated by electrolysis Not much hydrated Highly hydrated Cannot prepared directly, prepared by special method only Prepared easily by directly mixing with the liquid dispersion medium Viscosity is almost same as that of the medium Viscosity is higher than that of medium Surface tension is nearly same as that of dispersion medium Surface tension is usually lower than that of the dispersion medium Solution generally formed by metals, their sulphides etc. (inorganic substances) Usually formed by organic substances like starch, gum, proteins etc. They carry either +ve or-ve charge Carry no charge CLASSIFICATION – DEPENDING UPON MOLECULAR SIZE Types of colloids:- Multi molecular colloids:-When on dispersion of a substance in the dispersion medium, a large number of atoms or smaller molecules of the substance(< 1mm) aggregate together to form species having size in colloidal range, the species thus formed are called multimolecular colloids. E.g. a gold solution consists of particles of various sizes which are clusters of various gold atoms. A solution of sulphur consists of colloidal particles which are aggregates of S8 molecules. Macro molecular colloids:- These are the substances which on dissolution form solution in which the dispersed phase have the size of particles of colloidal range. Such substances are called macromolecular colloids. E.g. colloidal solution of starch, protein, cellulose, carbohydrates etc. These solutions are quite stable & versatile with True solution. Manmade: Polythene, Nylon, synthetic rubber, etc. Associated colloids:- These are substances which when dissolved in the medium behave as normal electrolyte at low concentration but behave as colloid at higher concentration.
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