APPENDICE B: Potentiels de réduction standards pour demi-réactions choisies E°red (V) 1,23 Demi-réaction O2(g) + 4H*(aq) + 4 e¯ → 2 H2O(1) Br2(1) + 2 e → 2 Br(aq) Ag*(aq) + e → Ag(s) Fe3+(aq) + e¯ → Fe²*(aq) Cu(OH)2(s) + 2 e¯ → Cu(s) + 2 OH(aq) 2H*(aq) + 2 e → H2(g) Pb2+ (aq) + 2 e → Pb(s) Ni2*(aq) + 2 e → Ni(s) Cd2*(aq) + 2 e → Cd(s) Fe2*(aq) + e¯ → Fe(s) 2 H20(1) + 2 e→ H2 + 2 OH(aq) Na*(aq) + e* → Na(s) [Zn(OH)4]²(aq) +2 e¯ → Zn(s) + 4 OH(aq) 1,09 0,80 0,77 0,34 0,00 -0,126 -0,26 -0,40 -0,45 -0,83 -2,71 -1,22

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
icon
Related questions
Question

Zinc reacts with copper hydroxide by the following oxidation-reduction reaction (unbalanced) in a basic medium:
Zn(s) + Cu(OH)2(s)----> [Zn(OH)4]2- (aq) + Cu(s)

a) Balance the reaction in a basic medium

b) Write down the two half reactions involved in this reaction, identifying the oxidation half reaction and the reduction half reaction. Using the data in Appendix B, find the standard oxidation and reduction potentials for each half reaction. Find the standard potential, E0reaction, of the global reaction
Oxidation half reaction:         E0OX=
Half reduction reaction:       E0RED=
E0 reaction:

c) A stack is built using components of this reaction. Calculate the potential, Epile, of the battery at 25°C if the concentration of [Zn (OH)4]2-(aq) was 0.10 M and the pH of the solution was 12? (Hint: use the Nernst equation)

 

APPENDICE B: Potentiels de réduction standards pour demi-réactions choisies
Demi-réaction
E'red (V)
1,23
O2(g) + 4H*(aq) + 4 e → 2 H2O(1)
Br2(1) + 2 e → 2 Br(aq)
Ag*(aq) + e → Ag(s)
Fe*(aq) + e → Fe²*(aq)
Cu(OH)2(s) +2 e → Cu(s) + 2 OH(aq)
2H*(aq) + 2 e → H2(g)
Pb2+ (aq) + 2 e¯ → Pb(s)
Ni²*(aq) + 2 e¯→ Ni(s)
Cd2+(aq) + 2 e → Cd(s)
Fe2*(aq) + e¯ → Fe(s)
2 H20(1) + 2 e → H2 + 2 OH´(aq)
Na*(aq) + e¯ →→ Na(s)
[Zn(OH)4]²(aq) +2 e¯ → Zn(s) + 4 OH(aq)
1,09
0,80
0,77
0,34
0,00
-0,126
-0,26
-0,40
-0,45
-0,83
-2,71
-1,22
Transcribed Image Text:APPENDICE B: Potentiels de réduction standards pour demi-réactions choisies Demi-réaction E'red (V) 1,23 O2(g) + 4H*(aq) + 4 e → 2 H2O(1) Br2(1) + 2 e → 2 Br(aq) Ag*(aq) + e → Ag(s) Fe*(aq) + e → Fe²*(aq) Cu(OH)2(s) +2 e → Cu(s) + 2 OH(aq) 2H*(aq) + 2 e → H2(g) Pb2+ (aq) + 2 e¯ → Pb(s) Ni²*(aq) + 2 e¯→ Ni(s) Cd2+(aq) + 2 e → Cd(s) Fe2*(aq) + e¯ → Fe(s) 2 H20(1) + 2 e → H2 + 2 OH´(aq) Na*(aq) + e¯ →→ Na(s) [Zn(OH)4]²(aq) +2 e¯ → Zn(s) + 4 OH(aq) 1,09 0,80 0,77 0,34 0,00 -0,126 -0,26 -0,40 -0,45 -0,83 -2,71 -1,22
Expert Solution
steps

Step by step

Solved in 2 steps with 2 images

Blurred answer
Knowledge Booster
Electrolysis
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
Chemistry
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY