An impure and thick block of metal M is used as anode in the electrolytic refining process, whereas a thin strip or wire of pure metal M is used as a cathode. The electrolyte is a metal M salt solution that is appropriate.
An impure and thick block of metal M is used as anode in the electrolytic refining process, whereas a thin strip or wire of pure metal M is used as a cathode. The electrolyte is a metal M salt solution that is appropriate.