what is colidal solution ? define its phases and give example
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A colloid mixture has particles that are not as small as a solution and not as large as a suspension. The particles are intermediate in size. What makes the colloid mixture unique is that the particles are assorted throughout pretty evenly and they stay that way.
(1) Phases of colloids: We know that a colloidal solution is of heterogeneous nature. It consists of two phases which are as follows
(i) Internal phase or Dispersed phase (Discontinuous phase) : It is the component present in small proportion and is just like a solute in a solution. For example in the colloidal solution of silver in water (silver acts as a dispersed phase)
(ii) External phase or Dispersion medium (continuous phase) : It is generally component present in excess and is just like a solvent in a solution. For example, in the colloidal solution of silver in water. Water act as a dispersion medium.
(2) Classification of colloids : The colloids are classified on the basis of the following criteria
(i) Classification based on the physical state of the dispersed phase and dispersion medium : Depending upon the physical state of dispersed phase and dispersion medium whether these are solids, liquids or gases, eight types of colloidal systems are possible.
Some examples include whipped cream, mayonnaise, milk, butter, gelatin, jelly, muddy water, plaster, colored glass, and paper. Every colloid consists of two parts: colloidal particles and the dispersing medium. The dispersing medium is the substance in which the colloidal particles are distributed.
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(1) Phases of colloids: We know that a colloidal solution is of heterogeneous nature. It consists of two phases which are as follows
(i) Internal phase or Dispersed phase (Discontinuous phase) : It is the component present in small proportion and is just like a solute in a solution. For example in the colloidal solution of silver in water (silver acts as a dispersed phase)
(ii) External phase or Dispersion medium (continuous phase) : It is generally component present in excess and is just like a solvent in a solution. For example, in the colloidal solution of silver in water. Water act as a dispersion medium.
(2) Classification of colloids : The colloids are classified on the basis of the following criteria
(i) Classification based on the physical state of the dispersed phase and dispersion medium : Depending upon the physical state of dispersed phase and dispersion medium whether these are solids, liquids or gases, eight types of colloidal systems are possible.
Some examples include whipped cream, mayonnaise, milk, butter, gelatin, jelly, muddy water, plaster, colored glass, and paper. Every colloid consists of two parts: colloidal particles and the dispersing medium. The dispersing medium is the substance in which the colloidal particles are distributed.
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A colloid or a colloidal solution is a heterogeneous mixture in which one substance is displaced as very fine particles having size in the range of 1 to 100 nm , in a continuous medium for another substances.
They are heterogeneous mixture .
They can pass through filter paper .
They show Tyndall effect.
Example - Fog , cloud , milk etc.
They are heterogeneous mixture .
They can pass through filter paper .
They show Tyndall effect.
Example - Fog , cloud , milk etc.
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