Given the standard reduction potentials, which combination in the answer choices below would produce the lowest cell voltage when combined into a voltaic cell? Remember that one of the half reactions will serve as the oxidation reaction. Use the equation: Ecell Ered (cathode) - Ered (anode) to calculate the cell voltage. = 12(s) + 2e-21-(aq) Agt(aq)+ e- Ag(s) Cu²+ (aq) + 2e- → Cu(s) Cr³+(aq) + 3e- → Cr(s) Al³+(aq) + 3e- → Al(s) Sn²+ (aq) + 2 e- Sn(s) 12(s) & Cr(s) Cu²+(aq) & Sn(s) Cu²+ (aq) & Cr(s) Ag* (aq) & Al(s) Eºreduction 0.54 V 0.80 V 0.34 V - 0.74 V -1.66 V -0.14 V

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Chapter19: Electrochemistry
Section: Chapter Questions
Problem 19.140QP
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Question
Given the standard reduction potentials, which combination in the answer
choices below would produce the lowest cell voltage when combined into a
voltaic cell? Remember that one of the half reactions will serve as the
oxidation reaction. Use the equation:
Ecell Ered (cathode) - Ered (anode) to calculate the cell voltage.
=
12(s) + 2e → 21¯(aq)
Ag+ (aq) + e- → Ag(s)
Cu²+ (aq) + 2e-→ Cu(s)
Cr³+(aq) +3e- → Cr(s)
Al³+ (aq) + 3e- → Al(s)
Sn²+ (aq) + 2 e- → Sn(s)
12(S) & Cr(s)
Cu²+ (aq) & Sn(s)
Cu²+ (aq) & Cr(s)
Ag+ (aq) & Al(s)
Ereduction
0.54 V
0.80 V
0.34 V
- 0.74 V
-1.66 V
-0.14 V
Transcribed Image Text:Given the standard reduction potentials, which combination in the answer choices below would produce the lowest cell voltage when combined into a voltaic cell? Remember that one of the half reactions will serve as the oxidation reaction. Use the equation: Ecell Ered (cathode) - Ered (anode) to calculate the cell voltage. = 12(s) + 2e → 21¯(aq) Ag+ (aq) + e- → Ag(s) Cu²+ (aq) + 2e-→ Cu(s) Cr³+(aq) +3e- → Cr(s) Al³+ (aq) + 3e- → Al(s) Sn²+ (aq) + 2 e- → Sn(s) 12(S) & Cr(s) Cu²+ (aq) & Sn(s) Cu²+ (aq) & Cr(s) Ag+ (aq) & Al(s) Ereduction 0.54 V 0.80 V 0.34 V - 0.74 V -1.66 V -0.14 V
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