# Problem: 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?

###### FREE Expert Solution

Cu2+ (aq) + Cu (s) → Cu2+ (aq) + Cu (s)

↓ E° → oxidation → anode

↑ E° → reduction → cathode

$\overline{){\mathbf{E}}{{\mathbf{°}}}_{{\mathbf{cell}}}{\mathbf{=}}{\mathbf{E}}{{\mathbf{°}}}_{{\mathbf{cathode}}}{\mathbf{-}}{\mathbf{E}}{{\mathbf{°}}}_{{\mathbf{anode}}}}$

E°cell = 0 V

Calculate Ecell.

[Cu2+] anode must be less than [Cu2+] cathode to have a positive Ecell

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###### Problem Details

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?