Concentration

[Fiona Latifi 1A]

How does concentration affect cell potential?

[805291863]

The affect of concentration on cell potential can be seen through the Nerst Equation, which includes Q. The reaction quotient is determined by the concentrations of the products and reactants, so concentrations will affect the cell potential

[Charlene Datu 2E]

The Nernst equation is
Cell potential = standard cell potential - (RT/nF)lnQ

When products>reactants, Q>1. Therefore, lnQ is positive. When this occurs, the sign of the cell potential will be dependent on whether the standard cell potential is greater than or less than (RT/nF)lnQ.

When products<reactants, Q<1. Therefore, lnQ is negative. When this occurs, the cell potential will always be positive and spontaneous.

[Susanna Givan 2B]

Oh, thank you so much!