## Why is E Standard=0 in a concentration cell?

$E_{cell} = E_{cell}^{\circ}-\frac{RT}{nF}\ln Q$

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

### Why is E Standard=0 in a concentration cell?

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?

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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Joined: Sat Aug 24, 2019 12:17 am

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

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?

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

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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