A voltaic cell consists of a Cd/Cd²⁺ electrode (E$\degree$ = -0.40 V) and a Fe/Fe²⁺ electrode (E$\degree$= -0.44 V). If E_cell = 0 and the temperature is 25$\degree$C, what is the ratio [Fe²⁺]/[Cd²⁺]?

Question

Quizplus · Accepted Answer

The cell potential E$_{cell}$ is zero, indicating equilibrium. Using the Nernst equation, the ratio [Fe$^{2+}$]/[Cd$^{2+}$] can be calculated as 10$^1$ or 10, which corresponds to choice A.

A Voltaic Cell Consists of a Cd/Cd2+ Electrode (E °\degree° = -040 V) and a Fe/Fe2+ Electrode (E

A Voltaic Cell Consists of a Cd/Cd²⁺ Electrode (E $\degree$ = -040 V) and a Fe/Fe²⁺ Electrode (E