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If we change the null half-potential, would it change half-potentials of other half-cell reactions by the same amount, so that voltages of net reactions stay the same?

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    $\begingroup$ Yes, you should be right: changing the standard electrode changes the half-cell potentials but the galvanic cell potentials (resulting from a pair of electrodes) stay the same. $\endgroup$ – Philipp Aug 15 '13 at 16:19

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