How to determine Q

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

Andrea_Torres
Posts: 98
Joined: Sun Sep 15, 2019 12:15 am

How to determine Q

In the Nernst Equation there is Q and I know that you divide one on top of the other but how do I know which is on top of the other?

Tyler Angtuaco 1G
Posts: 130
Joined: Wed Sep 11, 2019 12:16 am

Re: How to determine Q

Q is non-equilibrium ratio of products to reactants. So, you'll need to identify which species are the products and which ones are the reactants in the overall cell reaction.

cassidysong 1K
Posts: 100
Joined: Fri Aug 30, 2019 12:15 am

Re: How to determine Q

^^^ I agree with Tyler, it depends on the reaction given. Through the reaction given you are able to determine which is the product and which is the recatant.

Rohit Ghosh 4F
Posts: 99
Joined: Thu Jul 25, 2019 12:17 am

Re: How to determine Q

Yes by writing the reactions, you can figure out the products and reactants and put them in the equation.

ABombino_2J
Posts: 102
Joined: Thu Jul 11, 2019 12:15 am

Re: How to determine Q

When you write out the half reactions and add them to make the complete equation the answer will result in the reaction that you base Q off of.

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