mention type of the following colloids. Smoke, Jelly, fog, coloured gemestone, cloud, sponge, mud, mist, butter, face cream, shaving cream, milk of magnesia, pumice stone
Answers
Answer:
Suspension is the heterogeneous mixture of two or more substances. In suspension, particles are suspended throughout in bulk and can be seen by naked eyes. In suspensions, particles of solute do not dissolve rather are suspended. Particles of suspension are large enough to scatter rays of light and path of ray is visible through a suspension.
Example of suspension – mixture of chalk and water, muddy water, mixture of flour and water, mixture of dust particles and air, fog, milk of magnesia, etc.
Explanation:
General Characteristics of Suspension:-
Suspensions are heterogeneous mixture of two or more substances.
Particles of solute do not dissolve in solvent rather they remain suspended in bulk throughout.
The size of particles of suspension is large enough to be visible from naked eyes. They are greater than 1 nanometre (10^−9metre).
Suspension shows Tyndall effect because of their large size of particles.
When suspension is left for some time, particles get settled in bottom.
Therefore, suspension is not stable.
The particles of suspension can be separated through the process of filtration.
Suspension does not scatter light when particles are settled because in this case suspension breaks.
Milk of magnesia, fog, mixture of chalk and water, etc. are some examples of suspension.
Colloidal Solution:-
Colloidal solution is a heterogeneous mixture of two or more substances. Colloidal solutions appear homogenous because of relatively small size of particles in comparison with suspension. Particles of colloidal solution are called colloid. Colloids are dispersed throughout the solvent. Particles of colloidal solution are not visible through naked eye but scatter the ray of light, i.e. show Tyndall effect. Colloids cannot be separated by filtration but can be separated using centrifugation. Milk, ink, blood, solution of soap or detergent, etc. are some common examples of colloidal solution.
General Characteristics of Colloidal
Solution:-
Colloidal solutions are heterogeneous mixture of two or more substances.
Colloidal solutions appear homogeneous.
The size of colloids is between the size of particles of solution and suspension, i.e. between 1 nanometer to 1000 nanometer.
Colloids cannot be seen even using optical microscope.
Colloids show Tyndall effect, i.e. they scatter the ray of visible light.
Colloidal solutions may be opaque, translucent or of light colour.
Colloids cannot be separated by filtration. But they can be separated by centrifugation. For example fat can be separated by centrifugation from milk.
Colloidal solutions are stable since colloids cannot settle down when left undisturbed.
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