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An electrochemical cell is constituted by combining Al electrode (E^0 = - 1.66v) and Cu electrode (E0 = + 0.34v).

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An electrochemical cell is constituted by combining Al electrode (E0 = - 1.66v) and Cu electrode (E0 = + 0.34v). Which of these electrodes will work as cathode and why?

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Since the electrode potential of Cu is higher than that of Al, therefore, Cu has ahigher tendency to get reduced and hence Cu electrode acts as a cathode.

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