Questions 20 and 21 refer to the following information. Galvanic Cell Cell Diagram E° cell (Volts) Mg | Mg2(1.0 M) || Pb*2(1.0 M) | Pb 2.24 1 Zn | Zn2(1.0 M) || Pb*2(1.0 M) | Pb 0.63 2 Mg | Mg?(1.0 M) || Zn*(1.0 M) | Zn ? 3 The chemical reaction occurring in first galvanic cell is: Mg + Pb*2 → Mg2 + Pb
Questions 20 and 21 refer to the following information. Galvanic Cell Cell Diagram E° cell (Volts) Mg | Mg2(1.0 M) || Pb*2(1.0 M) | Pb 2.24 1 Zn | Zn2(1.0 M) || Pb*2(1.0 M) | Pb 0.63 2 Mg | Mg?(1.0 M) || Zn*(1.0 M) | Zn ? 3 The chemical reaction occurring in first galvanic cell is: Mg + Pb*2 → Mg2 + Pb
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:Questions 20 and 21 refer to the following information.
Galvanic Cell
Cell Diagram
E°cell (Volts)
Mg | Mg2(1.0 M) || Pb*2(1.0 M) | Pb
1
2.24
Zn | Zn(1.0 M) || Pb*2(1.0 M) | Pb
2
0.63
Mg | Mg*(1.0 M) || Zn*2(1.0 M) | Zn
3
The chemical reaction occurring in first galvanic cell is: Mg + Pb*2 → Mg+2 + Pb
21. If the concentration of Mg+2 is changed from 1.0 M to 3.0 M in the galvanic cells above, what will
happen to the observed cell voltages in galvanic cells 1 and 3?
(A) The voltage in both galvanic cells 1 and 3 will increase.
(B) The voltage will decrease in both galvanic cells 1 and 3.
(C) The voltage in galvanic cell 1 will increase and will decrease in galvanic cell 3
(D) The voltage in galvanic cell 3 will increase and will decrease in galvanic cell 1.
22.
Consider a voltaic cell based on these half-cells.
Ag (aq) +e → Ag/s)
Cd (aq) + 2e → Cd¢s)
E* = +0.80 V
E = -0.40 V
Identify the anode and give the voltage of this cell under
standard conditions.
(A) Ag; Ecell = 0.40 V
(B) Ag; Ecell = 2.00 V
(C) Cd; Ecell = 1.20 V
(D) Ag; Ecell = 2.00 V
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