Nerst Equation

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Samantha Chung 4I
Posts: 77
Joined: Wed Oct 03, 2018 12:16 am

Nerst Equation

Postby Samantha Chung 4I » Tue Mar 05, 2019 10:08 pm

How do we know when to apply the Nerst equation, are there hints in the question that I should look out for?

Tuong-Minh Tran 1C
Posts: 30
Joined: Fri Sep 28, 2018 12:19 am

Re: Nerst Equation

Postby Tuong-Minh Tran 1C » Tue Mar 05, 2019 10:42 pm

The Nernst equation is generally used to solve for the cell potential of a galvanic cell. If a problem gives standard cell potentials of half-reactions as well as any information that can be used to solve for Q (the reaction quotient), such as the concentration/pressure of reactants and products, then you should probably use the Nernst equation.

Diviya Khullar 1G
Posts: 59
Joined: Fri Sep 28, 2018 12:19 am

Re: Nerst Equation

Postby Diviya Khullar 1G » Tue Mar 05, 2019 11:40 pm

You use the Nerst equation to find cell potential () using the standard cell potential (), gas constant (), moles of electrons transferred (), Faraday's constant (), and the reaction quotient (). You just have to really read the question to determine what information you are given when determining whether to use the Nerst equation or not.

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Joined: Fri Sep 28, 2018 12:18 am

Re: Nerst Equation

Postby Karishma_1G » Tue Mar 05, 2019 11:51 pm

The Nernst equation is most often used to find the cell potential at a certain point during the reaction. The equation uses the standard cell potential and Q. If two out of these three variables (cell potential, standard cell potential, reaction quotient/concentrations) are given in a problem, I would use the Nernst equation to solve for the missing value.

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Joined: Fri Sep 28, 2018 12:19 am

Re: Nerst Equation

Postby MadisonB » Wed Mar 06, 2019 1:52 am

In general, for any problem, I find it helpful to write out all the variables I am given and the variables I need to find. Then, I look at the equation sheet and try to find a way to get from A to B. This will work the same for the Nernst equation.

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