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This lesson covers the practical applications of electrolysis for Edexcel GCSE Chemistry (1CH0). You need to understand electroplating, the purification of copper, industrial uses, and the economic and environmental considerations associated with electrolysis.
Electroplating is the process of coating an object with a thin layer of metal using electrolysis. It is used to improve the appearance of objects, protect them from corrosion, or increase their hardness and durability.
The electrolysis cell for electroplating is set up as follows:
| Component | What It Is |
|---|---|
| Cathode (−) | The object to be plated (e.g. a steel spoon, a piece of jewellery) |
| Anode (+) | A piece of the plating metal (e.g. silver, nickel, chromium, gold) |
| Electrolyte | A solution containing ions of the plating metal (e.g. silver nitrate solution for silver plating) |
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