Answered: A voltaic cell similar to that shown in…

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter17: Electrochemistry And Its Applications

Section: Chapter Questions

Problem 93QRT

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A voltaic cell similar to that shown in Figure 20.5 is constructed. One half-cell consists of an aluminum strip placed
in a solution of Al1NO323, and the other has a nickel strip
placed in a solution of NiSO4. The overall cell reaction is
2 Al1s2 + 3 Ni
2+1aq2 ¡ 2 Al
3+1aq2 + 3 Ni1s2
(a) What is being oxidized, and what is being reduced?
(b) Write the half-reactions that occur in the two half-cells.
(c) Which electrode is the anode, and which is the cathode?
(d) Indicate the signs of the electrodes. (e) Do electrons
flow from the aluminum electrode to the nickel electrode
or from the nickel to the aluminum? (f) In which directions
do the cations and anions migrate through the solution?
Assume the Al is not coated with its oxide

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