Two zinc electrodes are put into two aqueous solutions of zinc sulfate at 0.10M and 1.0 M concentrations. The two solutions are connected by a salt bridge to form a galvanic cell. What is the cell potential? (The standard reduction potential of Zinc electrode is â0.76 V)

10V

0.1V

0.0296V

0.0257V

0.152V

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Hubert KochLv2

13 Dec 2019

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You decide to construct a zinc/aluminum galvanic cell in which the electrodes are connected by a wire and the solutions are connected with a salt bridge. One electrode consists of an aluminum bar in a 1.0 M solution of aluminum nitrate. The other electrode consists of zinc bar in a 1.0 M solution of zinc nitrate.

a. Which electrode is the cathode and which is the anode?

b. What is the direction of electron flow?

c. What chemical reactions are occurring at each electrode?

d. What is the overall balanced chemical reaction?

e. After a period of time, will the bar of zinc become heavier, lighter or stay the same? What about the aluminum bar?

f. What is the standard cell potential?