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Problem If Fe 3 + + Y 4 − ⇌ FeY − \text{Fe}^{3+} + Y^{4-} \rightleftharpoons \text{FeY}^- Fe 3 + + Y 4 − ⇌ FeY − K f = 1.3 × 10 25 K_f = 1.3 \times 10^{25} K f = 1.3 × 1 0 25 Fe 2 + + Y 4 − ⇌ FeY 2 − \text{Fe}^{2+} + Y^{4-} \rightleftharpoons \text{FeY}^{2-} Fe 2 + + Y 4 − ⇌ FeY 2 − K f = 2.1 × 10 14 K_f = 2.1 \times 10^{14} K f = 2.1 × 1 0 14 Fe 3 + + e − → Fe 2 + \text{Fe}^{3+} + e^- \rightarrow \text{Fe}^{2+} Fe 3 + + e − → Fe 2 + E ∘ = + 0.77 V E^\circ = +0.77 \text{ V} E ∘ = + 0.77 V E ∘ E^\circ E ∘ FeY − + e − → FeY 2 − \text{FeY}^- + e^- \rightarrow \text{FeY}^{2-} FeY − + e − → FeY 2 − 0.13 V 0.13 \text{ V} 0.13 V − 0.636 V -0.636 \text{ V} − 0.636 V + 0.636 V +0.636 \text{ V} + 0.636 V 1.41 V 1.41 \text{ V} 1.41 V Browse the problem library