What happens to the potential generated in an electrochemical cell as reactant concentration increases?

In an electrochemical cell, the potential generated, also known as the cell potential or electromotive force (EMF), is influenced by the concentration of reactants and products according to the Nernst equation. As the concentration of reactants increases, the reaction quotient (Q) changes, which affects the equilibrium position of the cell reaction.

When the concentration of reactants increases, the Nernst equation indicates that the potential will increase, assuming that the temperature and other conditions remain constant. This occurs because a higher concentration of reactants shifts the electrochemical equilibrium toward the formation of products, thus generating a greater potential.

Moreover, in a spontaneous reaction, the increase in the concentration of reactants enhances the driving force for the reaction, leading to an increased cell potential. This relationship is crucial for understanding how changes in concentration influence the efficiency and output of electrochemical processes.

Therefore, the statement that the potential generated in an electrochemical cell increases with increasing reactant concentration is rooted in the fundamental principles of electrochemistry.