electroplatingelectroplating
Electroplating is the process in which a metallic object is coated with another metal by electrolysisElectroplating is the process in which a metallic object is coated with another metal by electrolysis
electroplating with copperelectroplating with copper electroplating an object with copper: electroplating an object with copper:
- +
object (cathode)
copper (anode)
CuSO4
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at the cathode, Cu2+ ions are discharged as copper metal and deposited on the object
electroplating with copperelectroplating with copper
Cu(s) Cu2+(aq) + 2e
the electrolyte is CuSO4 solution
object is made the cathode; copper is made the anode
at the anode, copper dissolves
Cu2+(aq) + 2e Cu(s)
transfer of copper from anode to the cathode; CuSO4 solution remains unchanged
many metallic objects can be electroplated in the same way:
electroplatingelectroplating
electroplatingelectroplating
o object is made of cathodeo metal used for electroplating is made the anodeo electrolyte is a solution of ions of the metal
o object is made of cathodeo metal used for electroplating is made the anodeo electrolyte is a solution of ions of the metal
electroplatingelectroplating
examples of electroplating:
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Electroplating MetalElectroplating Metal UsesUses
chromium water taps, motorcar, and bicycle parts
tin tin cans
silversilver-plated sports trophies, plaques,
ornaments, knives and forks
nickelcorrosion-resistant layer before
electroplating with another metal on top