For the coagulation of 100 mL of As2S3 sol, 5 mL of 1 M NaCl is required. The flocculation value of NaCl is:
Correct answer: A. 50
- A. 50
- B. 5
- C. 47.6
- D. None of these
Explanation
Millimoles of NaCl added = 5 Volume of the sol containing NaCl solution = 100 mL. Floccul ation value is the amount of electrolyte (in millimoles) that must be added to 1L of the colloidal solution so as to bring about complete coagulation.
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