b.) Write the overall balanced redox reaction occurring in this voltaic cell. How many electrons are being transferred? c.) Calculate E°cei, in v. Is this process spontaneous? d.) Calculate AG°, in kJ/mol.

Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter17: Electrochemistry And Its Applications
Section17.3: Voltaic Cells
Problem 17.3PSP
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Ignore Part A

1.) Consider the following reduction half-reactions.
Cra-(aq) + 3 e → Cr(s)
2 H;0(1) + 2 e → H:(g) + 2 OH(g)
a.) Draw a diagram of a voltaic cell made from Cr(NO:):(aq)|Cr(s) and
Pt(s)|H;O(1)|H:(g) + OH(aq) with NaC(aq) as a salt bridge. Make sure to label:
• Anode and cathode
• The oxidation and reduction half-reactions and where they are occurring
• The direction the electrons are flowing (away and toward)
• If the solid electrode is gaining, losing, or has no change in mass
• if the concentration of ions in solution are increasing, decreasing, or
remaining constant
• The direction the ions in the salt bridge (cations AND anions) are moving
Transcribed Image Text:1.) Consider the following reduction half-reactions. Cra-(aq) + 3 e → Cr(s) 2 H;0(1) + 2 e → H:(g) + 2 OH(g) a.) Draw a diagram of a voltaic cell made from Cr(NO:):(aq)|Cr(s) and Pt(s)|H;O(1)|H:(g) + OH(aq) with NaC(aq) as a salt bridge. Make sure to label: • Anode and cathode • The oxidation and reduction half-reactions and where they are occurring • The direction the electrons are flowing (away and toward) • If the solid electrode is gaining, losing, or has no change in mass • if the concentration of ions in solution are increasing, decreasing, or remaining constant • The direction the ions in the salt bridge (cations AND anions) are moving
b.) Write the overall balanced redox reaction occurring in this voltaic cell. How many
electrons are being transferred?
c.) Calculate E°cal, in V. Is this process spontaneous?
d.) Calculate AG°, in kl/mol.
e.) Calculate Eei in V at 298 K when [Cr(NO:):] is 0.125 M, the pressure of H:(g) is
1.50 atm, and the pH is 9.463. Is the process still spontaneous?
Transcribed Image Text:b.) Write the overall balanced redox reaction occurring in this voltaic cell. How many electrons are being transferred? c.) Calculate E°cal, in V. Is this process spontaneous? d.) Calculate AG°, in kl/mol. e.) Calculate Eei in V at 298 K when [Cr(NO:):] is 0.125 M, the pressure of H:(g) is 1.50 atm, and the pH is 9.463. Is the process still spontaneous?
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