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Question
What happens when an electric field is applied to a colloidal dispersion?
Short Answer
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Solution
When an electric field is applied to a colloidal dispersion, the charged colloidal particles move towards the oppositely charged electrode, a phenomenon called electrophoresis. If the particle movement is restricted by a semipermeable membrane, the dispersion medium moves in the opposite direction, known as electro-osmosis. This behavior confirms that colloidal particles carry a definite charge.
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