Cu2+ (aq) + Cu (s) → Cu2+ (aq) + Cu (s)
↓ E° → oxidation → anode
↑ E° → reduction → cathode
E°cell = 0 V
[Cu2+] anode must be less than [Cu2+] cathode to have a positive Ecell
A Cu/Cu2+ concentration cell has a voltage of 0.21V at 25 °C. The concentration of Cu2+ in one of the half-cells is 1.6. What is the concentration of Cu2+ in the other half-cell?
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