Chemistry
Write an ionic reaction at the electrodes during electroplating of silver over brass spoon after giving the ionisation of the electrolyte.
Electrolysis
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Answer
Dissociation of sodium silver cyanide
Na[Ag(CN)2] ⇌ Na1+ + Ag1+ + 2CN1-
H2O ⇌ H1+ + OH1-
Reaction at cathode [article to be plated]
Ag1+ + 1e1- ⟶ Ag [Ag deposited on article]
Reaction at anode [block of active-silver]
Ag - 1e1- ⟶ Ag1+ [product nil - Ag1+ ions]
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