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Chemistry · L4 · Electroplating setup: which electrode gains mass

A silver-electroplating cell traced electrode by electrode: the silver anode dissolves and loses mass, while the object being plated — the cathode — gains mass, with the amount fixed by m = ItM/(zF).

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DC power source(known current I, time t)Anode: silver barAg -> Ag+ + e-LOSES massCathode: the spoonAg+ + e- -> AgGAINS massAgNO3 electrolyte bathMass gained at cathodem = I t M / (z F)+ terminal- terminalAg+ ions dissolve into solutionAg+ ions migrate to the cathode

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