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Chemistry: A Molecular Approach | 3rd Edition | ISBN: 9780321809247 | Authors: Nivaldo J. Tro
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A battery relies on the oxidation of magnesium and the

Chapter 18, Problem 113E

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QUESTION:

 A battery relies on the oxidation of magnesium and the reduction of Cu2+. The initial concentrations of Mg2+ and Cu2+ are 1.0 x 10-4 M and 1.5 M, respectively, in 1.0-liter half-cells. a. What is the initial voltage of the battery?

b. What is the voltage of the battery after delivering 5.0 A for 8.0 h?

c. How long can the battery deliver 5.0 A before going dead?

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QUESTION:

 A battery relies on the oxidation of magnesium and the reduction of Cu2+. The initial concentrations of Mg2+ and Cu2+ are 1.0 x 10-4 M and 1.5 M, respectively, in 1.0-liter half-cells. a. What is the initial voltage of the battery?

b. What is the voltage of the battery after delivering 5.0 A for 8.0 h?

c. How long can the battery deliver 5.0 A before going dead?

ANSWER:

Problem 113EA battery relies on the oxidation of magnesium and the reduction of Cu2+. The initialconcentrations of and are and 1.5 M, respectively, in 1.0 -literhalf-cells.a. What is the initial voltage of the batteryb. What is the voltage of the battery after delivering 5.0 A for 8.0 hc. How long can the battery deliver 5.0 A before going dead Step by step solutionStep 1 of 3For the given reactionFrom the standard reduction potentials of the half cells we haveCathode:Anode:Therefore,a) According to Nernst equation, we have -Therefore, of the given cell is\nTherefore, the initial voltage of the battery is 2.83V._____________________________________________________________________________

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