When a dilute $\mathrm{AgNO}_3$ solution is mixed with excess of dilute $\mathrm{KI}$, the colloidal…
When a dilute $\mathrm{AgNO}_3$ solution is mixed with excess of dilute $\mathrm{KI}$, the colloidal solution formed is
$\mathrm{AgNO}_3 / \mathrm{I}^{-}$
Agl
$\mathrm{Agl} / \mathrm{Ag}^{+}$
$\mathrm{Agl} / \mathrm{I}^{-}$
Solution
When dilute aqueous solution of $\mathrm{AgNO}_3$ is added to dilute solution of $\mathrm{KI}$ (excess) a negatively charged sol of AgI is formed due to the preferential adsorption of $\mathrm{I}^{-}$ions from the dispersion medium.