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During the electrolysis of copper (II) sulphate solution using platinum as cathode and carbon as anode: (i) What do you observe at the cathode and at the anode? (ii) What change is noticed in the electrolyte? (iii) Write the reactions at the cathode and at the anode. |
Answer» (i) Red metal copper deposits at cathode and colourless odourless gas oxygen at Anode. (ii) The blue colour of copper sulphate solution soon fades. (iii) At Cathode: Cu++ + 2e- ⟶ Cu At Anode : OH - e- ⟶ OH 4 [OH]⟶ 2H2O + O2 ↑ |
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