In the process of purification of copper metal, a thin plate of pure copper and a thick rod of impure copper are used as electrodes, and a metal salt solution is used as an electrolyte:
(a) Which electrode is connected to the positive terminal of the battery?
(b) Which electrode is connected to the negative terminal of the battery?
(c) Which metal salt solution is taken as electrolyte?
Answers
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30
Answer:
- Anode ( impure copper ) is connected to the positive end of the battery.
- Cathode ( pure copper ) is connected to the negative terminal of the battery.
- Salt solution of Metal ( CuSO4 ) is taken as electrolyte.
Answered by
9
(a) Thick rod of impure copper is connected to the positive terminal of the battery.
(b) Thin rod of pure copper is connected to the negative terminal of the battery.
(c) Copper sulphate solution is taken as electrolyte.
Explanation:
- Here, electroplating process is done.
- The plate that is need to be electroplated is connected as cathode.
- The plated that is used to plate is connected as anode.
- The electrolyte is water soluble salt of metal.
- Here, chemical effect of electric current is used for electroplating.
- When electric current is passed through electrodes, the metal ions in impure copper metal reacts with salt electrolyte and ions are deposited on cathode.
- After sometimes, the thickness of the anode increases and thickness of the cathode decreases.
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