Concentration Matters

The Nernst equation

An interactive lesson with 5 steps, about 5 minutes: you predict, drag and solve, with instant feedback on every answer. It runs in your browser and needs JavaScript.

What you’ll learn

• E = E° − (0.0592/n) log Q at 25 °C.
• Voltage sags as products build up; zero at equilibrium.
• Concentration cells: same chemistry, different concentrations.

Steps

1. Off-standard
2. Running low on copper
3. Squeeze out more volts
4. A flat battery
5. Nerves run on Nernst