Calculating Standard Cell Potential

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PeterTran1C
Posts: 30
Joined: Thu Jul 13, 2017 3:00 am

Calculating Standard Cell Potential

Postby PeterTran1C » Wed Mar 14, 2018 2:46 pm

Just for confirmation, there are two ways to calculate the standard cell potential.
For example if you were given the following:
A --> A+1 + 1e- E = 0.70 V
B --> B+2 + 2e- E= -0.20 V

You can calculate the standard cell potential by determining that the highest E value will be the cathode and the other will be the anode. With this information you can do Standard Cell Potential = E(cathode) - E(anode).

OR

You can flip the oxidizing reaction, hence flipping the sign of the E value for that reaction, and then adding up all the cell potentials to get the standard cell potential.

With both ways, you should get the same answer right?

Adrienne Dang 1B
Posts: 30
Joined: Fri Sep 29, 2017 7:05 am

Re: Calculating Standard Cell Potential

Postby Adrienne Dang 1B » Wed Mar 14, 2018 2:48 pm

Yes exactly! You should get the same answer for both methods, it just depends on which method you prefer (I personally prefer using Ecell=Ecathode-Eanode just because it's easier for me)

Patricia Macalalag 2E
Posts: 53
Joined: Sat Jul 22, 2017 3:00 am

Re: Calculating Standard Cell Potential

Postby Patricia Macalalag 2E » Wed Mar 14, 2018 7:57 pm

Yes!! This was very helpful


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