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Question
Copper sulphate solution is electrolyzed using copper electrodes. Study the diagram given alongside and answer the questions that follow.
- Which electrode to your left or right is known as the oxidizing electrode and why?
- Write the equation representing the reaction that occurs.
- State two appropriate observations for the above electrolysis reactions.
Solution
- The electrode on the left (anode) side donates electrons and hence is the oxidizing electrode.
- \[\ce{Cu - 2e- -> Cu^{2+}}\]
- The anode size steadily lowers while the cathode size gradually increases. However, the colour of the copper sulphate solution does not change.
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