Question

Write the equation which correlates the electrode potential of an electrode assembly with the concentration of ions and the temperature. What is the name of the equation and what is its significance?

Answer 1

The equation that relates the electrode potential (E) of an electrode with the concentration of ions and temperature is called the Nernst equation.

\[\ce{E = E^{\circ}_{cell} - \frac{0.0591}{n} log Q}\]

Significance of the Nernst equation:

1. It allows us to calculate the electrode potential under non-standard conditions (i.e., concentrations ≠ 1 M).
2. It helps in understanding how concentration affects electrode potential.
3. It is used to predict the direction of redox reactions and calculate cell EMF under actual conditions.