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A colloid is formed by adding FeCl(3) in...

A colloid is formed by adding `FeCl_(3)` in excess of hot water. What will happen if excess sodium chloride is added to this colloid?

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On adding `FeCl_(3)` to water, a colloidal sol of hydrate ferric oxide is formed which carries +ve charge due to adsorption of `Fe^(3+)` ions on its surface. On adding `NaCl, Cl^(-)` ions bring about coagulation of the sol.
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