7(iv)
Answer the following questions with reference to electrorefining of copper:
(a) What is the anode made of?
(b) What do you observe at the cathode?
(c) Write the reaction taking place at the cathode.
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(a) Impure block of copper.
(b) Pure copper is deposited on the thin sheet of pure copper placed at the cathode.
(c) Cu2+ + 2e- ⟶ Cu