## Calculating Standard Potentials

Letty Liu 2C
Posts: 105
Joined: Fri Aug 09, 2019 12:16 am

### Calculating Standard Potentials

When calculating standard potentials for electrodes and two redox reactions, do we just subtract the right from the left for electrodes but use standard Gibbs free energy for two redox reactions?

Justin Sarquiz 2F
Posts: 106
Joined: Fri Aug 30, 2019 12:15 am

### Re: Calculating Standard Potentials

To calculate the standard potential energy, you do Ecathode-Eanode. It is not always right minus left because someone could draw the anode on the right if he or she wanted to.

Posts: 49
Joined: Thu Jul 25, 2019 12:16 am

### Re: Calculating Standard Potentials

the cell diagram should always have the cathode on the right so your method should be correct but to avoid getting the wrong answer due to an error in the set up of the cell diagram remember that it is E cathode - E anode

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

### Re: Calculating Standard Potentials

And remember that because standard potential energy is an intensive property, we don't need to multiply by coefficients.

Jialun Chen 4F
Posts: 108
Joined: Sat Sep 07, 2019 12:16 am

### Re: Calculating Standard Potentials

Use the equation ECathode - EAnode; in a Galvanic cell, the standard setup is having anode on the left (oxidation) and cathode on the right (reduction).