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Galvanic Cells Potential

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1. The standard-state cell potential for the following reaction is 1.66 V.

2 Al (s) + 6 H3O+ (aq) --> Al3+ (aq) + 3 H2 (g) + 3 H2O (l)

Using the information in Table 1, calculate the standard-state half-cell potential for the following half-reaction:

Al (s) --> Al3+ (aq) + 3 e-

2. Using the information in Table 1, and the half-cell potential you calculated in Question 1,
calculate the standard-state cell potential for the following reaction:

Al (s) + Ag+ (aq) --> Al3+ (aq) + Ag (s)

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Solution attaches a .doc file to explain how to find the potential of some half-reaction with galvanic cells.

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Table 1. Some Standard-State Half-Cell Reduction potentials.a

Half-reaction E (V)
Zn2+ (aq) + 2 e-  Zn (s) -0.76
Fe2+ (aq) + 2e-  Fe (s) -0.44
Ni2+ (aq) + 2 e-  Ni (s) -0.25
Pb2+ (aq) + 2e-  Pb (s) -0.13
2 H3O+ (aq) + 2 e-  Cu ...

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