Consider the following electrochemical cells under standard conditions (all aqueous concentrations , — Electrochemistry Chemistry Question

💡 Solution & Explanation

Cells B and C are concentration cells constructed with identical electrodes in both the anode and cathode compartments. Because the standard reduction potential of the cathode is identically equal to the standard reduction potential of the anode, the standard cell potential $E^\circ_{cell} = E^\circ_{cathode} - E^\circ_{anode} = 0$. Since concentrations are standard ($1\text{ M}$), $E_{cell}$ is also 0.