Nernst Equation
The Nernst equation describes the relationship between cell potential and concentration for electrochemical cells. Explore how different ion concentrations create voltage in concentration cells!
1. Connect the concentration cell to complete the circuit. 2. Observe electron flow and voltage. 3. Change concentrations to see how potential varies.
The Science Behind Concentration Cells
For a concentration cell at 25°C:
Ecell = E° - (0.0592/n) log(Q)
Where Q = [dilute]/[concentrated]
- E° = Standard cell potential (0 V for concentration cells)
- n = Number of electrons transferred
- Q = Reaction quotient (ratio of concentrations)
Concentration cells generate voltage from differences in ion concentration between two identical half-cells.
Electrons flow from the more dilute solution (anode) to the more concentrated solution (cathode).
The cell potential decreases as concentrations equalize through the reaction.
