Question

The electrolyte which is highly effective for the coagulation of antimony sulphide sol is:
 

• A. \( {K}_2 {SO}_4 \)
• B. \( {CaCl}_2 \)
• C. \( {AlCl}_3 \)
• D. \( {Na}_3 {PO}_4 \)

Hint:

For coagulation of sols, use electrolytes with high charge ions to neutralize the charges on the sol particles.

Answer 1

The Correct Option is C

The coagulation of sols depends on the charge of the sol particles and the charge on the electrolyte used. For antimony sulphide sol (a negative sol), the most effective electrolyte is one that has a highly charged ion. Aluminum chloride (\( {AlCl}_3 \)) contains \( {Al}^{3+} \) ions, which are highly effective at neutralizing the negative charge on the sol particles, thereby leading to coagulation. 
Final Answer:  \( {AlCl}_3 \) is the most effective electrolyte for coagulating antimony sulphide sol.