ELECTROPLATING

COPPER COATING · LIVE IONS


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Copper Plating a Spoon +− battery CuSO₄ solution (blue) anode (+) copper cathode (−) spoon Cu²⁺ ions → time (current 2 A) copper deposited anode lost
1. Reactions Anode: Cu → Cu²⁺ + 2e⁻ (oxidation) Cathode: Cu²⁺ + 2e⁻ → Cu (reduction) The amount of Cu²⁺ in the solution stays the same
2. Uses of Electroplating • Chromium: car parts, taps (shine + rust protection) • Tin: food cans · Silver: jewellery, cutlery • Nickel: base layer before chromium
3. Remember The object to be plated → cathode (−)Plate of the plating metal → anode (+)
MATRIC CHEMISTRY · ELECTROCHEMISTRY · PUNJAB BOARDS
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