2) Using the following reduction half-reactions and their respective standard reduction potentials at 25°C, draw a diagram of a galvanic cell. Cr2O72-(aq) + 14 H*(aq) +6e- →2 Cr3+(aq) + 7 H2O Zn2+(aq) + 2 e-→ Zn(s) A) Zn2+(aq) | Zn(s), H*(aq) || Cr20,2-(aq), Cr(s) | Cr3*(aq) B) Cr(s) | Cr3+(aq), H*(aq), Cr2O-2-(aq) || Zn(S) | Zn²*(aq) C) Zn(s) | Zn2“(aq) | Cr2O,2-(aq), H*(aq), Cr3*(aq) | Pt(s) D) Pt(s) | Cr3+(aq), C2072-(aq), H«(aq) || Zn²*(aq) I Zn(s) E) Zn(s) |Zn²*(aq) I H*(aq), Cr³(aq) I Cr(s) E° = +1.33 V E° = -0.763 V
2) Using the following reduction half-reactions and their respective standard reduction potentials at 25°C, draw a diagram of a galvanic cell. Cr2O72-(aq) + 14 H*(aq) +6e- →2 Cr3+(aq) + 7 H2O Zn2+(aq) + 2 e-→ Zn(s) A) Zn2+(aq) | Zn(s), H*(aq) || Cr20,2-(aq), Cr(s) | Cr3*(aq) B) Cr(s) | Cr3+(aq), H*(aq), Cr2O-2-(aq) || Zn(S) | Zn²*(aq) C) Zn(s) | Zn2“(aq) | Cr2O,2-(aq), H*(aq), Cr3*(aq) | Pt(s) D) Pt(s) | Cr3+(aq), C2072-(aq), H«(aq) || Zn²*(aq) I Zn(s) E) Zn(s) |Zn²*(aq) I H*(aq), Cr³(aq) I Cr(s) E° = +1.33 V E° = -0.763 V
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...
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Transcribed Image Text:2) Using the following reduction half-reactions and their respective standard reduction potentials at 25°C, draw
a diagram of a galvanic cell.
Cr2O72-(aq) + 14 H*(aq) +6e- →2 Cr3+(aq) + 7 H2O
Zn2+(aq) + 2 e-→ Zn(s)
A) Zn2+(aq) | Zn(s), H*(aq) || Cr20,2-(aq), Cr(s) | Cr3*(aq)
B) Cr(s) | Cr3+(aq), H*(aq), Cr2O-2-(aq) || Zn(S) | Zn²*(aq)
C) Zn(s) | Zn2“(aq) | Cr2O,2-(aq), H*(aq), Cr3*(aq) | Pt(s)
D) Pt(s) | Cr3+(aq), C2072-(aq), H«(aq) || Zn²*(aq) I Zn(s)
E) Zn(s) |Zn²*(aq) I H*(aq), Cr³(aq) I Cr(s)
E° = +1.33 V
E° = -0.763 V
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