Nernst Equation and Le Chatelier's Principle

$E_{cell} = E_{cell}^{\circ}-\frac{RT}{nF}\ln Q$

Charisse Vu 1H
Posts: 101
Joined: Thu Jul 25, 2019 12:17 am

Nernst Equation and Le Chatelier's Principle

Can someone summarize how le chatelier's principle and the nernst equation are related?

Christine Honda 2I
Posts: 116
Joined: Sat Sep 14, 2019 12:17 am

Re: Nernst Equation and Le Chatelier's Principle

Using Le Chatelier's principle which takes into account the increase in either products or reactants concentrations, the Ecell will either decrease or increase. If the concentrations of the reactants are increased, then Ecell will be greater than Estandard. If the concentrations of the products are increased, then Ecell will be less than Estandard. Because both Ecell and Estardard are in the Nernst equation, the change in concentration will affect the result.

Rory Simpson 2F
Posts: 106
Joined: Fri Aug 09, 2019 12:17 am

Re: Nernst Equation and Le Chatelier's Principle

Basically, the cell potential of a given reaction is dependent on the concentrations on the species in the reaction. At equilibrium in a reaction, the cell potential is zero because the reaction no longer does any work. The Nernst equation gives a quantitative answer as to how different concentrations affect the cell potential (because of lnQ in the equation), similar to Le Chatelier's Principle of concentrations affecting the direction of the reaction.

Shutong Hou_1F
Posts: 117
Joined: Sat Sep 14, 2019 12:17 am

Re: Nernst Equation and Le Chatelier's Principle

I think that Nernst Equation and Le Chaterlier's Principle support each other. According to Le Chatelier's Principle, the cell potential should change in corresponding ways when concentrations change in specific ways. Supportively, by manipulating variables in known equation, the Nernst Equation is derived, revealing that prediction based on Le Chatelier's Principle is correct.

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