Nernst

[Susanna Givan 2B]

When do we use the nernst equation? Like under what conditions?

[Simrah_Ahmed1J]

The Nernst equation is E= E^o - (R*T/n*F)*lnQ
at 25^o that is equal to E= E^o - (0.592/n)*logQ
and then at equilibrium and 25^o it is logK=n*E^o/0.0592

[JonathanM]

The nernst equation is used to calculate the cell potential at non-standard conditions, so as long as you know three of the four variables in the equation (E, E^o, T and Q) you can solve for the last one. Most often in real settings you will know E^o, T, and Q, so you can solve for E. Hope this helps!

[kateraelDis1L]

well when we use Q we know the reaction is not at equilibrium, maybe this helps you! So when calculating cell potential when reaction has not reached equilibrium use Q in Nernst.

[Diana Aguilar 3H]

Hi! Like many others have stated, you use the nernst equation when you are calculating the cell potential under non-standard conditions/when the reaction is not at equilibrium.

[305561744]

The Nernst equation is used for calculating cell potential under substandard conditions.

[Shawn Suen]

We use the nernst equation to find E when conditions are non standard