I'm confused on the formula for calculating cell potential?

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Adriana Rangel 1A
Posts: 96
Joined: Fri Sep 29, 2017 7:04 am

I'm confused on the formula for calculating cell potential?

Postby Adriana Rangel 1A » Wed Mar 14, 2018 10:01 pm

So on the equation sheet and in the textbook, it says the cell formula for calculating cell potential is
Eo= Eo (right electrode, cathode)- Eo (left electrode,anode)??
But then on other websites it says to find the standard cell potential you ADD them not subtract them ? Look at these websites:
http://www.chem.purdue.edu/gchelp/howto ... ntials.htm

and

https://www.chem.wisc.edu/deptfiles/gen ... /18_52.htm
I want to know because I am trying to solve 14.19

DianaTrujillo2K
Posts: 40
Joined: Fri Sep 29, 2017 7:04 am

Re: I'm confused on the formula for calculating cell potential?

Postby DianaTrujillo2K » Wed Mar 14, 2018 10:07 pm

When you use the equation given on the equations sheet for tests, you always subtract E°cathode-E°anode leaving the numbers as they are given to you.

Another way to solve for E°cell is to determine which is the cathode and which is the anode. Once you have determined which is the anode you change the sign of E°anode and add the E°cathode and E°anode together.


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