2. What should be the concentration of the Ni(NO3)2 solution for the electromotive force of the element to be zero?
Co|Co(NO3)2(0.1 M)|Ni(NO3)2,(x M)|Ni
The average ionic activity coefficient for each of the salts is taken to be equal to one. (T = 298 K). Provide the equations of the electrode processes.

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