MCQ
$Cu^+ + e^-\to Cu$ ; $E^o = X_1V$
$Cu^{2+} + 2e^-\to Cu$ ; $E^o = X_2V$
Then For $Cu^{2+} + e^- \to Cu^+$ $;E^o$ will be ?
- A$X_1 -2X_2$
- B$X_1 + 2X_2$
- C$X_1 -X_2$
- ✓$2X_2 -X_1$
✓
Answer
Correct option: D.
$2X_2 -X_1$
d
$\Delta \mathrm{G}_{3}^{\circ}=\Delta \mathrm{G}_{2}^{\circ}-\Delta \mathrm{G}_{1}^{\circ}$
$\Delta \mathrm{G}_{3}^{\circ}=\Delta \mathrm{G}_{2}^{\circ}-\Delta \mathrm{G}_{1}^{\circ}$
$-1\times \text{F}\times {{\text{E}}^{{}^\circ }}=$ $\left( -2\times \text{F}\times {{\text{X}}_{2}} \right)$ $-\left( -1\times \text{F}\times {{\text{X}}_{1}} \right)$
$\mathrm{E}^{\circ}=2 \mathrm{X}_{2}-\mathrm{X}_{1}$
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