Describe any three properties of collides?
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The intensity of the scattered light depends on the difference between the refractive indices of the dispersed phase and the dispersion medium. ... In case of lyophilic solution, the colloidal particles are highly solvated, which results into lower difference in refractive index of ...
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1) Colloid is a heterogeneous mixture.
2) The size of colloid particle is too small to be seen individually by naked eyes.
3) They are big enough to scatter a beam of light passing through it, thus exhibiting Tyndall Effect.
2) The size of colloid particle is too small to be seen individually by naked eyes.
3) They are big enough to scatter a beam of light passing through it, thus exhibiting Tyndall Effect.
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When the movement of the Colloidal particles is prevented by some suitable means, it is observed that the Dispersion medium itself begins to move under the influence of an electric field. This phenomenon is known as Electro osmosis.
The Molecules of the Dispersion medium constantly collide with the colloidal particles thereby passing Kinetic Energy to them.
This phenomenon results into zigzag movement of the colloidal particles.
This zigzag movement of the colloidal particles is known as Brownian movement.
A British Physicist John Tyndall in 1869 first observed this phenomenon and hence it is known as Tyndall Effect.
He observed that when a beam of light is passed through a colloidal solution, the light is scattered by the particles present in the colloidal solution.
This effect is often used as a measure of the existence of a colloid.
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