Concentration Cells

[Ardo 2K]

What are the significance of concentration cells?

[Nathan Tu 2C]

Concentration cells are special in that they create electricity because of only a difference in concentration. The difference in ion concentration drives electron flow because the system wants to reach equilibrium. There is only a difference in concentration because it is the same solution.

[Emily Oren 3C]

Concentration cells can be used to make a simple battery (using only a difference in concentration not substance) but not a very strong one

[Masih Tazhibi 2I]

..Also, as the concentrations of the two half reactions change, the voltage also changes

[Nora 1F]

It also might be helpful to keep in mind that with a concentration cell, the lower concentration should be the product concentration.

[Ashley Garcia 2L]

A concentration cell consists of two half-cells with the same electrodes but with different concentrations. This difference in ion concentration drives the flow of electrons from the more concentrated solution to the lower concentrated solution, which creates a voltage as the cell reaches equilibrium. The concentration gradient creates this voltage.