43. Given the standard electrode potentials: V and V. Calculate the standard electrode potential for — Electrochemistry Chemistry Question
Question
43. Given the standard electrode potentials: $E^\circ(Au^+/Au) = 1.69$ V and $E^\circ(Au^{3+}/Au) = 1.40$ V. Calculate the standard electrode potential for the intermediate step $E^\circ(Au^{3+}/Au^+)$.
Answer: B
💡 Solution & Explanation
$\Delta G_1^\circ (Au^+ \rightarrow Au) = -1F(1.69)$. $\Delta G_2^\circ (Au^{3+} \rightarrow Au) = -3F(1.40) = -4.20F$. The target is $Au^{3+} \rightarrow Au^+$. $\Delta G_3^\circ = \Delta G_2^\circ - \Delta G_1^\circ = -4.20F - (-1.69F) = -2.51F$. Since $n=2$ for this step, $-2FE^\circ_3 = -2.51F \implies E^\circ_3 = 2.51 / 2 = 1.255$ V.
💬Ask on WhatsApp →
Still have doubts about this question?
Send it to our AI chemistry tutor on WhatsApp — gets answered in minutes