National League for Nursing (NLN PAX) Practice Exam

Question: 1 / 495

What is the correct voltage of a chemical cell once it has reached equilibrium?

1v

Greater than 1v

Between 0 and 1v

0v

In a chemical cell, the voltage represents the electric potential difference between the two electrodes, driven by the chemical reactions occurring within the cell. When a chemical cell reaches equilibrium, the forward and reverse reactions occur at equal rates, meaning there is no net change in the concentrations of the reactants and products. At this stage, the electrical potential difference falls to zero, indicating that no further work can be done by the cell.

This state of equilibrium is characterized by the lack of a driving force for the reactions, which translates to a voltage of 0 volts. Thus, once equilibrium is achieved in a chemical cell, the voltage is exactly zero.

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