Galvanic vs. Concentration Cells

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Tai Metzger 3K
Posts: 103
Joined: Sat Aug 24, 2019 12:17 am

Galvanic vs. Concentration Cells

Postby Tai Metzger 3K » Tue Feb 25, 2020 10:05 pm

What is the difference between Galvanic and Concentration cells and which is more important? Thanks!

Amanda Lin 2I
Posts: 101
Joined: Sat Aug 17, 2019 12:15 am

Re: Galvanic vs. Concentration Cells

Postby Amanda Lin 2I » Tue Feb 25, 2020 10:39 pm

For concentration cells both sides have the same components, just different concentrations.

Kevin Xu 4F
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Joined: Fri Aug 09, 2019 12:16 am

Re: Galvanic vs. Concentration Cells

Postby Kevin Xu 4F » Wed Feb 26, 2020 2:59 am

Galvanic cells are also typically separated by a salt bridge whereas concentration cells are separated by a porous wall. In addition, the Ecell is typically lower voltage in concentration cell because the reaction is only driven by the difference in concentrations between the anode and cathode reactions as both compounds are of the same species, and Enot is always 0V.

KBELTRAMI_1E
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Joined: Sat Jul 20, 2019 12:17 am

Re: Galvanic vs. Concentration Cells

Postby KBELTRAMI_1E » Wed Feb 26, 2020 10:33 am

Kevin Xu 4F wrote:Galvanic cells are also typically separated by a salt bridge whereas concentration cells are separated by a porous wall. In addition, the Ecell is typically lower voltage in concentration cell because the reaction is only driven by the difference in concentrations between the anode and cathode reactions as both compounds are of the same species, and Enot is always 0V.


Yeah I think the main difference is that concentration cells have only one element with differing concentrations on either side of the porous wall, while galvanic cells typically have more than one element (so half reactions are used for calculating). Both are important though.

Nathan Rothschild_2D
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Joined: Fri Aug 02, 2019 12:15 am

Re: Galvanic vs. Concentration Cells

Postby Nathan Rothschild_2D » Wed Feb 26, 2020 12:37 pm

The difference is that galvanic cells are separated using a salt bridge which also means they will be shown as 2 lines (ll) when written out and Concentration cells are written out using 1 line (l). Both are very important esp in electro chemistry. Galvanic bridges also contain salt bridges in order to allow for ion transfers.

Asha Agarwal 1E
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Joined: Fri Aug 30, 2019 12:16 am

Re: Galvanic vs. Concentration Cells

Postby Asha Agarwal 1E » Wed Feb 26, 2020 1:06 pm

A Galvanic Cell relies on different metal electrodes for the flow of electrons where as concentration cells rely on different concentrations of the same metal in the electrodes to drive the flow of electrons.

Verity Lai 2K
Posts: 100
Joined: Sat Aug 24, 2019 12:18 am

Re: Galvanic vs. Concentration Cells

Postby Verity Lai 2K » Wed Feb 26, 2020 3:04 pm

Concentration cells have the same solution in each compartment, but they have different concentrations, hence the name. Galvanic cells have different metals in each compartment which transfer electrons from one solution to the other.


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