Question

3. Why a negatively charged sol is obtained on adding AgNO3 solution to KI

solution​

Answer 1

Answer:

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 AgNO3 + 40 mL of 0.1 M KCl

$m moles of AgNO3=50×0.1=5</p><p></p><p>m moles of KI=50×0.2=10</p><p></p><p>$

KI is in excess

So, I_ is adsorbed on AgI sol