Answer: 0.00 V.
- A +0.76 V
- B +1.10 V
- C 0.00 V
- D -0.76 V
Correct answer: C. 0.00 V
Explanation: The Standard Hydrogen Electrode (SHE) is the reference electrode with E° = 0.00 V by definition. All other electrode potentials are measured relative to the SHE.
Electron transfer in a redox reaction: zinc loses electrons (oxidised, acts as reducing agent) and copper(II) ions gain those same electrons (reduced, acts as oxidising agent).
Concept context
Master electron transfer in chemistry: assign oxidation states, balance half-reactions, identify oxidising and reducing agents, and connect redox to everyday reactions.