Concentration cells

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ConnorRazmaDis2I
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Joined: Fri Sep 28, 2018 12:26 am

Concentration cells

Postby ConnorRazmaDis2I » Mon Mar 04, 2019 8:18 pm

What defines a concentration cell?

Grace Kim 1J
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Re: Concentration cells

Postby Grace Kim 1J » Mon Mar 04, 2019 8:21 pm

A concentration cell is made up of two half-cells with the same electrodes but with different concentrations. This difference in ion concentration drives the flow of electrons from the more concentrated solution to the lower concentrated solution, which creates a voltage as the cell reaches equilibrium. The concentration gradient creates this voltage.

Hope this helped in defining concentration cells!

Irene Zhou 1E
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Re: Concentration cells

Postby Irene Zhou 1E » Mon Mar 04, 2019 8:35 pm

A concentration cell is a type of galvanic cell in which the two half-cells are made up of the same type of solution, only different in concentration. Also, the standard cell potential is equal to zero.

Jennifer Su 2L
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Re: Concentration cells

Postby Jennifer Su 2L » Tue Mar 05, 2019 1:38 am

In a concentration cell, Enot is always 0V, E is typically low voltage, and you always make the lower concentration the product ("it is in solution").

Jake Gordon 1A
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Re: Concentration cells

Postby Jake Gordon 1A » Tue Mar 05, 2019 10:20 am

In a concentration cell the solutions and electrodes are the same material. In class the example was Ag + solution and Ag electrodes. This contrasts from the galvanic cells we saw before with different solutions and metals for example Zn and Cu. In the concentration cell the electrons will flow from the less concentrated solution to that of the higher solution. This also means that the anode will lose mass and the cathode will gain mass.

Vanadium Wang 4H
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Re: Concentration cells

Postby Vanadium Wang 4H » Tue Mar 05, 2019 11:41 pm

A concentration cell is an electrolytic cell that is comprised of two half-cells with the same electrodes, but differing in concentrations. A concentration cell acts to dilute the more concentrated solution and concentrate the more dilute solution, creating a voltage as the cell reaches an equilibrium. This is achieved by transferring the electrons from the cell with the lower concentration to the cell with the higher concentration.

Karishma_1G
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Re: Concentration cells

Postby Karishma_1G » Tue Mar 05, 2019 11:49 pm

A concentration cell is a cell in which the two half cells are identical except for their concentrations. Therefore, the overall reaction's standard cell potential is zero and the reaction is driven by the difference in concentration. For the reaction to be spontaneous, usually the anode (site of oxidation) has a lower concentration than the cathode (site of reduction).


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