1.

What will be the charge on colloidal solutions in the following cases ?Give reasons for the origin of charge.

Answer»

(i) Ag+ ions are adsorbed on AgI, forming positively charged colloid.
(ii) I- ions are adsorbed on AgI forming negatively charged colloid. Reason for origin of charge is the preferential adsorption of common ions of the electrolyte present in excess.



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