Consider the following cell: Pt (s) | H₂ (8,1 atm)| H* (aq, a = 1)| Fe³ (aq), Fe²+ (aq) | Pt(s) (i) Write the overall cell reaction. (ii) If the cell potential is 0.712 V, and given that Fe3+ (aq) + e→ Fe2+ (aq) E° = 0.771 V, what is the ratio of Fe2+ (aq) to Fe3+ (aq) at 298.15 K? (iii) Calculate the fraction of the total iron present as Fe3+ (aq) at cell potentials of 0.650, 0.700, 0.750, 0.771, 0.800 and 0.900 V.

Chemistry: The Molecular Science
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Chapter17: Electrochemistry And Its Applications
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Consider the following cell:
Pt (s) | H₂ (8,1 atm)| H* (aq, a = 1)| Fe³ (aq), Fe²+ (aq) | Pt(s)
(i)
Write the overall cell reaction.
(ii)
If the cell potential is 0.712 V, and given that Fe3+ (aq) + e→ Fe2+ (aq)
E° = 0.771 V, what is the ratio of Fe2+ (aq) to Fe3+ (aq) at 298.15 K?
(iii) Calculate the fraction of the total iron present as Fe3+ (aq) at cell
potentials of 0.650, 0.700, 0.750, 0.771, 0.800 and 0.900 V.
Transcribed Image Text:Consider the following cell: Pt (s) | H₂ (8,1 atm)| H* (aq, a = 1)| Fe³ (aq), Fe²+ (aq) | Pt(s) (i) Write the overall cell reaction. (ii) If the cell potential is 0.712 V, and given that Fe3+ (aq) + e→ Fe2+ (aq) E° = 0.771 V, what is the ratio of Fe2+ (aq) to Fe3+ (aq) at 298.15 K? (iii) Calculate the fraction of the total iron present as Fe3+ (aq) at cell potentials of 0.650, 0.700, 0.750, 0.771, 0.800 and 0.900 V.
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