APFIVE Standard Potential of a Reversed Half-Reaction
Which of the following conclusions is best supported by the evidence that reversing a half-reaction changes the sign of its standard potential?
A
Reversing the half-reaction flips the sign of the electrode potential, since the reduction potential becomes the oxidation potential.
B
Reversing the half-reaction has no effect on the cell potential since standard potentials are invariant with respect to reaction direction.
C
The sign of the electrode potential remains unchanged when the half-reaction is reversed because the energy change is intrinsic.
D
When reversed, the half-reaction’s potential is doubled, as both directions contribute additively to the overall potential.
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