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Author Question: The standard free energies of formation of several species ... (Read 91 times)

yoroshambo

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on: Mar 21, 2021

Question 1

The reduction potentials for Ni2+ and Sn2+ are as follows:
Ni2+ + 2e– Ni, E° = –0.231 V
Sn2+ + 2e– Sn, E° = –0.140 V

Calculate the equilibrium constant at 25 °C for the reaction:
Sn2+ + Ni Sn + Ni2+

◦ 3.6 × 1012

◦ 35
◦ 5.9
◦ 8.3 × 10–4

◦ 1.2 × 103


Question 2

The standard free energies of formation of several species are:
 
kJ/mol
H+(aq)
0
H2O(l)
–237.0
CH3OH(aq)
–163.0
HCOOH(aq)
–351.2
e–
0
What is the standard reduction potential of methanoic acid in aqueous solution (i.e., for HCOOH + 4H+ + 4e– CH3OH + H2O)?


◦ 0.126 V
◦ 0.506 V
◦ –0.718 V
◦ –0.126 V
◦ 1.946 V
Chemistry: An Atoms First Approach ¦ Zumdahl, DeCoste ¦ 3rd Edition
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Marked as best answer by yoroshambo on Mar 21, 2021

connor417

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Reply #1 on: Mar 21, 2021
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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yoroshambo

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Reply 2 on: Mar 21, 2021
Great answer, keep it coming :)

peter

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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