A concentration cell uses identical Cu electrodes in Cu²⁺ solutions of different concentrations.
In this concentration cell, which electrode is the cathode?
- A
Both are simultaneously cathode
- B
Neither, since same metal
- C
The Cu in 0.10 M Cu²⁺ (less concentrated)
- Dcheck_circle
The Cu in 1.0 M Cu²⁺ (more concentrated)
Explanation
The system minimizes ΔG by reducing Cu²⁺ in the more concentrated half-cell, so that side is the cathode.