Question

What is the Nernst equation?

Answer 1

`E=E^@-(RT)/(nF)lnQ`

Explanation:

The Nernst Equation is the relationship between the cell potential and the concentrations of the solutions at the cathode and the anode. It is given by:

`E=E^@-(RT)/(nF)lnQ`

where, `E` is the cell potential,
`E^@` is the cell potential at standard conditions,
`R` is the universal gas constant `R=8.3145 J/(K*mol)`
`T` is the Kelvin temperature,
`n` is the number of electrons exchange during the Redox reaction in the cell,
`F=96485 C/(mol" " e^-)` is Farady's constant,
and `Q` is the reaction quotient.

Here is a video that explains in details the origin and use of the Nernst equation:
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Electrochemistry | The Concentration Cell.