For the coagulation of 100 ml of arsenous sulphide sol 4 ml of 1 M NaCl is required. What would be the flocculation value of NaCl?
Correct answer: A. 40
- A. 40
- B. 20
- C. 60
- D. 80
Explanation
The minimum amount of lyophilic colloid in mg which prevents the coagulation of 10 ml gold sol by 1 ml of 10% NaCl solution. So for 100 ml gold sol by 4 ml of 1 M NaCl solution is 40 ml.
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