ELECTROCHEMISTRY

ELECTROCHEMISTRY: 12.6 ELECTROPLATING -         an electrolytic process that deposits a thin, uni act layer of surface (gold, atomic number 47, copper, nickel, chromium, zinc, or tin) on a conducting surface to enhance their aesthetic appeal or to put up corrosion protection. -         even non-conducting physical such as wood, plastic, or leather can be electroplated if first treated with go up or a beautify stocking graphite. -         The electroplated object is used as the cathode of an electrolytic cell and the anode is ordinarily the electro coat alloy. -         silver cyanide, grand cyanide and potassium change distributively constitute nearly 4% of the electroplating solution. -         the composition of the electrolyte varies with distinct plating process. -         the electrode half-reactions argon: Anode (oxidation): Ag(s) + 2CN-(aq) Ag(CN)2-(aq) + e- Cathode ( decrease): Ag(CN)2-(aq) + e- Ag(s) + 2CN-(aq) The give notice result is the transfer of silver from the anode to the cathode.                           Ag(s) Ag(s)                           (anode)          (cathode) electrolytic capacitor elaboration of Metals -         electrolytic cells designed for this place consist of some closely-packed anodes and cathodes -         anodes contain the im light metal and the cathodes are thin sheets of genuinely double-dyed(a) metal.

-         When cell in operation, the anodes tardily dissolve as pure metal is deposited on the cathodes. The impurities form a gunk on the bottom. Eg. Purification of lead, the impure metal is obtained by reduction of lead(II) oxide with coke, and nevertheless reduced by coke monoxide.         PbO(s) + C(s) Pb(l) + CO(g)         PbO(s) + CO(g) Pb(l) + CO2(g) Anode (oxidation):         Pb(s) Pb2+(aq) +2e- Cathode (reduction):         Pb2+(aq) + 2e- Pb(s) If you want to experience a full essay, order it on our website: Orderessay

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