Question

when electric current is passed through copper solution using two copper plates , free copper gets deposited on the electrode connected to the negative terminal of the battery . if we replace the copper plate connected to the negative terminal of the battery by a carbon rod, then


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Answer 1

If we replace the copper plate connected to the negative terminal of the battery with a carbon rod, the copper will deposit on the carbon rod.

• When the current passes through the copper sulphate solution it breaks it down into copper and sulphate ions.
• The copper ions are cationic and, therefore they move towards the anode.
• The copper plate breaks down into copper ions and gets dissolved in the solution for the process of electroplating.
• The copper ions get deposited on the anode.
• The copper ions will get deposited on the anode irrespective of what we use as an anode. In this case, it is a carbon rod.