Concentration Cells

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Bella Townsend
Posts: 50
Joined: Wed Feb 20, 2019 12:18 am

Concentration Cells

Postby Bella Townsend » Tue Mar 17, 2020 9:29 pm

Do concentration cells ever have a positive Ecell? Can a cell be both galvanic and a concentration cell?

Riya Sood 4G
Posts: 160
Joined: Sat Aug 24, 2019 12:18 am

Re: Concentration Cells

Postby Riya Sood 4G » Tue Mar 17, 2020 10:21 pm

yes, concentration cells can have a positive Ecell value. This happens when the concentration at the anode is smaller than the concentration at the cathode.

Keep in mind that Ecell is different from E^standard cell which is always 0 for concentration cells. As long as the concentrations on the anode and cathode are different, there will be a concentration gradient created which generates electric current.

Jessica Chen 2C
Posts: 103
Joined: Thu Jul 11, 2019 12:17 am

Re: Concentration Cells

Postby Jessica Chen 2C » Tue Mar 17, 2020 11:38 pm

Yes, a cell can be both a galvanic and a concentration cell, as long as the concentration cell is spontaneous and can produce electrical energy via its redox reactions.

Return to “Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)”

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