Write short notes on Coagulation.

1.	Write short notes on Coagulation.
Answer» Coagulation:- The colloidal particle carry similar type of charge and thus due to mutual electrical repulsions are kept apart. But if this charge be somehow neutralized, the particles will come together to form large particles and hence precipitate out. "This precipitation of colloidal solution is known as Coagulation or Flocoulation." For example:- An addition of little barium chloride to a colloidal solution As₂S₃ the latter precipitates out. It is due to the fact that +vely charged Ba⁺⁺ ions are attracted by -vely charged particles of As₂S₃ with the result that the charged of the latter gets neutralized. Thus robbed or their charge, the As₂S₃ particles gather together to form bigger aggregates and finally settle down in the form of a precipitate.

Answer»

Coagulation:- The colloidal particle carry similar type of charge and thus due to mutual electrical repulsions are kept apart. But if this charge be somehow neutralized, the particles will come together to form large particles and hence precipitate out.

"This precipitation of colloidal solution is known as Coagulation or Flocoulation."

For example:- An addition of little barium chloride to a colloidal solution As₂S₃ the latter precipitates out. It is due to the fact that +vely charged Ba⁺⁺ ions are attracted by -vely charged particles of As₂S₃ with the result that the charged of the latter gets neutralized. Thus robbed or their charge, the As₂S₃ particles gather together to form bigger aggregates and finally settle down in the form of a precipitate.

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