Why is E Standard=0 in a concentration cell?


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Ryan Yoon 1L
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Joined: Mon Jul 01, 2019 12:15 am

Why is E Standard=0 in a concentration cell?

Postby Ryan Yoon 1L » Fri Feb 28, 2020 10:42 am

Question above

Sanjana Borle 2K
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Joined: Fri Aug 09, 2019 12:15 am

Re: Why is E Standard=0 in a concentration cell?

Postby Sanjana Borle 2K » Fri Feb 28, 2020 10:44 am

In a concentration cell, essentially the reduction half reaction and oxidation half reaction cancel each other out because the same type of solution is used in both compartments of the cell.

Kayli Choy 2F
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Re: Why is E Standard=0 in a concentration cell?

Postby Kayli Choy 2F » Fri Feb 28, 2020 4:16 pm

When finding Estandard, you usually take Estandard(cathode) - Estandard(anode), but in a concentration cell, because the two reactions are the reverse of each other, their Estandard values cancel out, so you get Estandard(cathode) - Estandard(anode) = 0 = Estandard.

Abby Soriano 1J
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Joined: Sat Aug 24, 2019 12:16 am

Re: Why is E Standard=0 in a concentration cell?

Postby Abby Soriano 1J » Fri Feb 28, 2020 6:18 pm

E standard = 0 in a concentration cell since you're essentially dealing with the same reaction occurring in both directions. The E standard of the reduction half-reaction is just the negative value of the E standard of the oxidation half-reaction, and so when you add them together, you get that the total voltage is just 0.

005206171
Posts: 107
Joined: Wed Sep 18, 2019 12:20 am

Re: Why is E Standard=0 in a concentration cell?

Postby 005206171 » Fri Feb 28, 2020 7:45 pm

At standard conditions, each compartment of the cell will be 1M. Assuming that a concentration cell uses the same solutions, then the potential difference at standard conditions is 0.


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