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.
From the given following sol how many can coagulate the haemoglobin sol
starch, clay, CdS, basic dye
Answer:
Solution:
Haemoglobin is a positively charged sol. Coagulation occurs when oppositely charged sols interact. Therefore, negatively charged sols will coagulate haemoglobin. From the given list, the negatively charged sols are , starch, clay, and CdS. Thus, 4 sols can coagulate haemoglobin.