8. Enter the data you collected in Table 2 here for each of your voltaic cells:

Question

8. Enter the data you collected in Table 2 here for each of your voltaic cells: Cell Copper-Tin sulfate Copper-Aluminum Voltage (in Volts) -0.010 0.20 sulfate Copper-Ferrous sulfate Copper-Zinc -0.60 sulfate 9. Write chemical reactions for each of the half cells in this experiment. Make sure to match the direction of the half-reaction to what occurs in your voltaic cell, i.e. don't write all reactions as reductions. Hint: The cathode is the same in all of the cells; so you will only be writing one cathodic reactions. Then you will also write four anodic reactions (one for each of the different cells).

Explanation / Answer

a)

Oxidation half cell:

Sn Sn2+ + 2e-

Reduction half cell:

Cu2+ + 2e Cu

b)

Oxidation half cell:

2 Al 2 Al3+ + 6e-

Reduction half cell:

3 Cu2+ + 6e 3 Cu

c)

Oxidation half cell:

Fe Fe2+ + 2e-

Reduction half cell:

Cu2+ + 2e Cu

d)

Oxidation half cell:

Zn Zn2+ + 2e-

Reduction half cell:

Cu2+ + 2e Cu

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