EMF diagram for iron is given as: underset(Fe = +6)E ° text(volts)FeO 42- xrightarrow+2.20 underset(Fe = +3)Fe 3+ xrightarrow+0.77 underset(Fe = +2)Fe 2+ xrightarrow-0.445 underset(Fe = +0)Fe 0 Determine the value of E FeO 42- / Fe 2+°

Question

EMF diagram for iron is given as: underset(Fe = +6)E ° text(volts)FeO 42- xrightarrow+2.20 underset(Fe = +3)Fe 3+ xrightarrow+0.77 underset(Fe = +2)Fe 2+ xrightarrow-0.445 underset(Fe = +0)Fe 0 Determine the value of E FeO 42- / Fe 2+° (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/f44833006c60995cbde2f291b9e7dfa0-.png" /> Δ G 3 °=Δ G 1 °+Δ G 2 ° - n × F × E 3°=-3 × F × 2.20-1 × F × 0.77 -4 × E 0°=-6.60-0.77 E °=(7.37/4)=1.84 E °=+1.84

Q. EMF diagram for iron is given as:
$(F e = + 6) E^{\circ} (volts) F e O_{4}^{2 -} + 2.20 (F e = + 3) F e^{3 +} + 0.77 (F e = + 2) F e^{2 +} - 0.445 (F e = + 0) F e^{0}$
Determine the value of $E_{F e O_{4}^{2 -} / F e^{2 +}}^{\circ}$

$Δ G_{3}^{\circ} = Δ G_{1}^{\circ} + Δ G_{2}^{\circ}$
$- n \times F \times E_{3}^{\circ} = - 3 \times F \times 2.20 - 1 \times F \times 0.77$
$- 4 \times E_{0}^{\circ} = - 6.60 - 0.77$
$E^{\circ} = \frac{7.37}{4} = 1.84$
$E^{\circ} = + 1.84$

Q. EMF diagram for iron is given as: (Fe=+6)E∘(volts)FeO42−​​+2.20​(Fe=+3)Fe3+​+0.77​(Fe=+2)Fe2+​−0.445​(Fe=+0)Fe0​ Determine the value of EFeO42−​/Fe2+∘​

ΔG3​∘=ΔG1​∘+ΔG2​∘ −n×F×E3∘​=−3×F×2.20−1×F×0.77 −4×E0∘​=−6.60−0.77 E∘=47.37​=1.84 E∘=+1.84

Q. EMF diagram for iron is given as:
$(F e = + 6) E^{\circ} (volts) F e O_{4}^{2 -} + 2.20 (F e = + 3) F e^{3 +} + 0.77 (F e = + 2) F e^{2 +} - 0.445 (F e = + 0) F e^{0}$
Determine the value of $E_{F e O_{4}^{2 -} / F e^{2 +}}^{\circ}$

$Δ G_{3}^{\circ} = Δ G_{1}^{\circ} + Δ G_{2}^{\circ}$
$- n \times F \times E_{3}^{\circ} = - 3 \times F \times 2.20 - 1 \times F \times 0.77$
$- 4 \times E_{0}^{\circ} = - 6.60 - 0.77$
$E^{\circ} = \frac{7.37}{4} = 1.84$
$E^{\circ} = + 1.84$