Chemistry - Surface Chemistry Question with Solution | TestHub
The minimum concentration of the electrolyte in millimoles per litre of a particular sol is called coagualation value or flocculation value of the electrolyte for the sol. The ions carrying opposite charge to that of sol particle are effective in causing coagulation of the sol. Coagulating power of an electrolyte is directly proportional to the valency of the active ions i.e., ions causing coagulation. Coagulation or flocculation is the precipitations of a colloid through induced aggregated of its particle.
In an experiment, addition of 5 ml of to 10 ml of sol just causes the complete coagulation in 34 hr . The flocculating value of the effective ion is
Answer:
Solution:
sol sol is-negatively charged owing to preferential adsorption of ions. Cation would be effective ion in coagulation.
Flocculation value milli moles of effective ion per
litre