Question

For the coagulation of 50 ml of ferric hydroxide solution, 10 ml of 0.5 M KCl is required. What is the coagulation value of KCl?

• A. 5
• B. 10
• C. 100
• D. None of these

Answer 1

The correct option is C 100

Coagulating value
Number of millimoles are
$=\frac{\text{electrolyte required}}{\text{Volume of colloidal solution (in litre)}}$
$=\frac{10\times 0.5}{50}\times 1000=100$