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Concentration Cells

Posted: Tue Mar 17, 2020 9:29 pm
by Bella Townsend
Do concentration cells ever have a positive Ecell? Can a cell be both galvanic and a concentration cell?

Re: Concentration Cells

Posted: Tue Mar 17, 2020 10:21 pm
by Riya Sood 4G
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.

Re: Concentration Cells

Posted: Tue Mar 17, 2020 11:38 pm
by Jessica Chen 2C
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.