In a coagulation experiment 10 mL of a colloid (X) is mixed with distilled water and 0.1M solution of an electrolyte AB so that the volume is 20 mL. It was found that all solutions containing more than 6.6 mL of AB coagulate with in 5 minutes. What is the flocculation values of AB for sol (X)?

Explanation

A minimum of 6.6mL of AB is required to coagulate the sol.
The moles of AB in the sol is `(6.6 xx 0.01)/(20) = 0.0033 moles
This means that a minimum of 0.033 moles or `0.0033 xx 1000 = 3.3` milli moles are required for coagulating one litre of sol.
Flocculation value of AB for X = 3.3