Question

When dilute aqueous solution of $AgN{O}_3$ (excess) is added to $KI$ solution, positively charge sol of $AgI$ in formed due to adsorption of:

• A. $N{O}_3^{-}$
• B. $O_2^{-}$
• C. $A{g}^{+}$
• D. $K^{+}$

Answer 1

The correct option is C $A{g}^{+}$

When $KI$ is added in excess of $AgN{O}_3$, a positively charged sol of silver iodide is formed due to adsorption of $A{g}^{+}$ from dispersion medium on the precipitate of silver iodide.