Question

A colloid prepared by the addition of Kl to AgNO3 solution is purified using
dialysis. Find the minimum mass in grams of an electrolyte AB' (GMM -
60) required to completely coagulate 18 of the aforementioned colloid
Given :
Active ion Flocculation
causing value(mmole/e)
flocculation
A 50
B 100
​

Answer 1

HEYA MATE YOUR ANSWER IS

In order to form a negatively charged colloidal sol on adding AgNO

3

solution into KI solution, KI should be in excess.

Among all options, KI is in excess in option B as shown:

50 mL of 0.1 M AgNO

3

+ 40 mL of 0.1 M KCl

m moles of AgNO

3

=50×0.1=5

m moles of KI=50×0.2=10

KI is in excess

So, I

−

is adsorbed on AgI sol

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