Question: Consider an electrochemical cell that has a nickel electrode immersed in 1.0 M Ni2+ and a platinu…

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Consider an electrochemical cell that has a nickel electrode immersed in 1.0 M Ni2+ and a platinum electrode immersed in 0.010 M Co2+.

Co2+ + 2e– –> Co E° = –0.28 V

Ni2+ + 2e– –> Ni E° = –0.23 V

Calculate the concentration of Ni2+ if the cell is allowed to run to equilibrium at 25°C.

A) 1.0 M B) 1.1 M C) 1.9 x10–4 M D) 0.020 M E) none of these

ANS: D

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