Use the experimental data to determine the approximate reduction potential for t

Question

Use the experimental data to determine the approximate reduction potential for the unknown. Before you hit "SUBMIT", consider your answer for Part C. Does your answer for this part make sense with what you know from Part C? If it does not make senes, recheck your work. Be sure to include the sign of the voltage value. Using the reduction potential value from Part D and the Standard Reduction Potential table from your textbook, determine which metal the unknown is and enter the reduction reaction equation given for it.

Explanation / Answer

Given, Ecell = -0.21 V

At standard conditions, 25 °C and 1 M concentrations, the measured voltage of the reduction half reaction is known as the standard reduction potential,

E°.Ecell = Ecathode - Eanode

The value -0.21V is close to the standard reduction potential of the Nickle from table (i.e. -0.25).

The reaction is:

Ni2+ (aq) + 2e- --------> Ni(s)

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