22. Given for is +0.337 V and for is +0.153 V. Calculate the standard electrode potential for the ha — Electrochemistry Chemistry Question
Question
22. Given $E^\circ$ for $Cu^{2+} + 2e^- \rightarrow Cu$ is +0.337 V and $E^\circ$ for $Cu^{2+} + e^- \rightarrow Cu^+$ is +0.153 V. Calculate the standard electrode potential for the half-reaction $Cu^+ + e^- \rightarrow Cu$.
Answer: C
💡 Solution & Explanation
Standard potentials cannot be added directly. Convert to free energy: $\Delta G_1^\circ = -2F(0.337)$, $\Delta G_2^\circ = -1F(0.153)$. The target reaction is (1) - (2): $\Delta G_3^\circ = -0.674F - (-0.153F) = -0.521F$. Since $\Delta G_3^\circ = -1FE^\circ_3$, $E^\circ_3 = +0.521$ V.
💬Ask on WhatsApp →
Still have doubts about this question?
Send it to our AI chemistry tutor on WhatsApp — gets answered in minutes