Cell Potential from Concentration Differences

Concentration cells are voltaic cells that use two almost identical half-cells. The half-cells use the same electrode and the same half-reaction. They differ only in the concentration of one redox species, so the cell potential depends on that concentration difference.

In a concentration cell, th...

The cell potential of a redox reaction depends significantly on the concentration of the reactants and products.

Consider a nickel-silver galvanic cell under standard conditions with a cell potential of 1.03 volts. A change in concentration, however, can either increase or decrease the cell potential.

If a concentration gradient i...