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How does active electrode affect the preferential discharge?Explain in details.

Asked by 19th October 2013, 12:55 PM
Answered by Expert

        Effect of nature of electrodes on preferential discharge:

  • Electrodes used in the process of electrolysis are either active or inert.
  • The electrodes used in electrolysis determine the ion preferred for discharge.
  • If inert electrodes like platinum or graphite are used, they will not take part in the electrolytic reaction.
  • The active electrodes like Cu, Ni, Ag take part in the electrolytic reaction and the product formed is different. For example, in the electrolysis of aqueous solution of CuSO4, if copper electrodes are used, copper atoms are deposited at the cathode and copper ions are formed at the anode.
  • But if platinum electrodes are used, copper atoms are deposited on the cathode and oxygen gas is evolved at the anode.
  • Thus the products formed during electrolysis are different for different electrodes.
Answered by Expert 21st October 2013, 3:16 PM
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