E vs Eo


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Anuradha S 1F
Posts: 50
Joined: Fri Sep 27, 2019 12:29 am

E vs Eo

Postby Anuradha S 1F » Sat Mar 14, 2020 10:15 am

In the equation

Ecell = Eo - ln Q

what is the difference between Ecell and Eo?

Rory Simpson 2F
Posts: 106
Joined: Fri Aug 09, 2019 12:17 am

Re: E vs Eo

Postby Rory Simpson 2F » Sat Mar 14, 2020 10:37 am

Eº is the standard cell potential which in this case refers to a cell under standard conditions (25ºC, 1atm, 1mol/L). E doesn't have these conditions, so you'd be calculating the cell potential for any differences in temperature or concentration, as the equation suggests.

Juliet Stephenson 4E
Posts: 100
Joined: Wed Sep 18, 2019 12:21 am

Re: E vs Eo

Postby Juliet Stephenson 4E » Sat Mar 14, 2020 10:38 am

E0 represents Ecell at standard conditions.

Anuradha S 1F
Posts: 50
Joined: Fri Sep 27, 2019 12:29 am

Re: E vs Eo

Postby Anuradha S 1F » Sat Mar 14, 2020 11:29 am

Rory Simpson 2F wrote:Eº is the standard cell potential which in this case refers to a cell under standard conditions (25ºC, 1atm, 1mol/L). E doesn't have these conditions, so you'd be calculating the cell potential for any differences in temperature or concentration, as the equation suggests.


Ah thank you sm!

Nicholas Chin 1G
Posts: 100
Joined: Thu Jul 11, 2019 12:17 am

Re: E vs Eo

Postby Nicholas Chin 1G » Sat Mar 14, 2020 12:50 pm

In some cases, standard E will be zero, so this equation can be used to find Ecell in concentration cells.

Anuradha S 1F
Posts: 50
Joined: Fri Sep 27, 2019 12:29 am

Re: E vs Eo

Postby Anuradha S 1F » Sat Mar 14, 2020 2:03 pm

Nicholas Chin 1G wrote:In some cases, standard E will be zero, so this equation can be used to find Ecell in concentration cells.

Is Eo only ever 0 in a concentration cell or is there another situation in which Eo = 0 ?

ValerieChavarin 4F
Posts: 99
Joined: Wed Sep 18, 2019 12:18 am

Re: E vs Eo

Postby ValerieChavarin 4F » Sat Mar 14, 2020 3:04 pm

Eº refers to standard conditions while E is not and therefore is affected by changes such as temperature, concentration etc.


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