Question

An electrochemical cell is constructed such that on one side a pure nickel electrode is in contact with a solution containing ni2 ions at a concentration of 3 �� 10-3 m. The other cell half consists of a pure fe electrode that is immersed in a solution of fe2 ions having a concentration of 0.1 m. At what temperature will the potential between the two electrodes be 0.140 v?

Answer 1

An electrochemical cell, also known as a concentration cell, uses two nearly identical half-cells with different concentrations of a redox species to generate a potential difference. The Nernst equation can be used to calculate the potential difference in a concentration cell.

Step-by-step explanation:

An electrochemical cell, also known as a concentration cell, consists of two nearly identical half-cells with the same electrode but different concentrations of a redox species. The potential of a concentration cell is determined by the difference in concentration of the chosen redox species. The Nernst equation can be used to calculate the potential difference in a concentration cell:

E = E° - (0.0592/n) * log(Q)

where E is the potential difference, E° is the standard cell potential, n is the number of electrons transferred, and Q is the reaction quotient.