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Calculate Eºcell (in V) and indicate whether the overall reaction shown is spontaneous or nonspontaneous under standard conditions: 2 Cr3+ (aq) + 3 Mg(s) → 2 Cr(s) + 3 Mg2+ (aq) Reduction half reaction Eºred (V) Ag+ (aq) + e- → → Ag(s) +0.80 Fe³+ (aq) + e- → Fe²+ (aq) +0.77 1₂(s) + 2e → 21¯(aq) +0.53 Cu²+ (aq) + 2e +0.34 Cu²+ (aq) + e- +0.15 Sn+ (aq) + 2e +0.13 Pb2+ (aq) + 2e -0.13 -0.25 Ni²+ (aq) + 2e Co2+ (aq) + 2e -0.28 I Cd²+ (aq) + 2e -0.40 Fe2+ (aq) + 2e -0.44 Cr³+ (aq) + 3e -0.74 Zn²+ (aq) + ? → Cu(s) → Cu+ (aq) → Sn²+ (aq) Pb(s) → Ni(s) → Co(s) → Cd(s) → Fe(s) → Cr(s)

Calculate Eºcell (in V) and indicate whether the overall reaction shown is spontaneous or nonspontaneous under standard conditions: 2 Cr3+ (aq) + 3 Mg(s) → 2 Cr(s) + 3 Mg2+ (aq) Reduction half reaction Eºred (V) Ag+ (aq) + e- → → Ag(s) +0.80 Fe³+ (aq) + e- → Fe²+ (aq) +0.77 1₂(s) + 2e → 21¯(aq) +0.53 Cu²+ (aq) + 2e +0.34 Cu²+ (aq) + e- +0.15 Sn+ (aq) + 2e +0.13 Pb2+ (aq) + 2e -0.13 -0.25 Ni²+ (aq) + 2e Co2+ (aq) + 2e -0.28 I Cd²+ (aq) + 2e -0.40 Fe2+ (aq) + 2e -0.44 Cr³+ (aq) + 3e -0.74 Zn²+ (aq) + ? → Cu(s) → Cu+ (aq) → Sn²+ (aq) Pb(s) → Ni(s) → Co(s) → Cd(s) → Fe(s) → Cr(s)

Chemistry: Principles and Practice
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter18: Electrochemistry
Section: Chapter Questions
Problem 18.48QE: The standard potential of the cell reaction Ag+(aq)+Eu2+(aq)Ag(s)+Eu3+(aq) is E = +1.23 V. Use the...
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Calculate Eºcell (in V) and indicate whether the overall reaction shown is spontaneous or nonspontaneous under standard conditions: 2 Cr3+ (aq) + 3 Mg(s) → 2 Cr(s) + 3 Mg2+ (aq) Reduction half reaction Ered (V) Ag+ (aq) + e → Ag(s) +0.80 Fe³+ (aq) + e → Fe²+ (aq) +0.77 1₂(s) + 2e → 21- (aq) +0.53 Cu²+ (aq) + 2e → Cu(s) +0.34 Cu²+ (aq) + e- → Cu+ (aq) +0.15 Sn4+ (aq) + 2e → Sn²+ (aq) +0.13 Pb²+ (aq) + 2e → Pb(s) -0.13 Ni²+ (aq) + 2e - → Ni (s) -0.25 Co2+ (aq) + 2e → Co(s) -0.28 I Cd²+ (aq) + 2e → Cd(s) -0.40 Fe2+ (aq) + 2e → Fe(s) -0.44 Cr³+ (aq) + 3e → Cr(s) -0.74 Zn²+ (aq) + 2e → Zn(s) -0.76
Transcribed Image Text:Calculate Eºcell (in V) and indicate whether the overall reaction shown is spontaneous or nonspontaneous under standard conditions: 2 Cr3+ (aq) + 3 Mg(s) → 2 Cr(s) + 3 Mg2+ (aq) Reduction half reaction Ered (V) Ag+ (aq) + e → Ag(s) +0.80 Fe³+ (aq) + e → Fe²+ (aq) +0.77 1₂(s) + 2e → 21- (aq) +0.53 Cu²+ (aq) + 2e → Cu(s) +0.34 Cu²+ (aq) + e- → Cu+ (aq) +0.15 Sn4+ (aq) + 2e → Sn²+ (aq) +0.13 Pb²+ (aq) + 2e → Pb(s) -0.13 Ni²+ (aq) + 2e - → Ni (s) -0.25 Co2+ (aq) + 2e → Co(s) -0.28 I Cd²+ (aq) + 2e → Cd(s) -0.40 Fe2+ (aq) + 2e → Fe(s) -0.44 Cr³+ (aq) + 3e → Cr(s) -0.74 Zn²+ (aq) + 2e → Zn(s) -0.76
Pb²+ Pb(s) Ni2+ (aq) + 2e → Ni (s) Co2+ (aq) + 2e → Co(s) Cd²+ (aq) + 2e → Cd(s) Fe2+ (aq) + 2e → Fe(s) Cr³+ (aq) + 3e → Cr(s) Zn²+ (aq) + 2e → Zn(s) Al³+ (aq) + 3e¯¯ → Al(s) Mg²+ (aq) + 2e- ->> Mg(s) Na + (aq) + e- → Na(s) Ca²+ (aq) + 2e → Ca(s) OA. Eºcell = -3.11 V, nonspontaneous O B. Eºcell = -1.63 V, nonspontaneous OC.Eºcell = 1.63 V, nonspontaneous OD. Eᵒcell = 3.11 V, spontaneous O E. Eºcell = 1.63 V, spontaneous + (aq) + 2e- -0.13 -0.25 -0.28 -0.40 -0.44 -0.74 -0.76 -1.66 -2.37 -2.71 -2.87
Transcribed Image Text:Pb²+ Pb(s) Ni2+ (aq) + 2e → Ni (s) Co2+ (aq) + 2e → Co(s) Cd²+ (aq) + 2e → Cd(s) Fe2+ (aq) + 2e → Fe(s) Cr³+ (aq) + 3e → Cr(s) Zn²+ (aq) + 2e → Zn(s) Al³+ (aq) + 3e¯¯ → Al(s) Mg²+ (aq) + 2e- ->> Mg(s) Na + (aq) + e- → Na(s) Ca²+ (aq) + 2e → Ca(s) OA. Eºcell = -3.11 V, nonspontaneous O B. Eºcell = -1.63 V, nonspontaneous OC.Eºcell = 1.63 V, nonspontaneous OD. Eᵒcell = 3.11 V, spontaneous O E. Eºcell = 1.63 V, spontaneous + (aq) + 2e- -0.13 -0.25 -0.28 -0.40 -0.44 -0.74 -0.76 -1.66 -2.37 -2.71 -2.87
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