Cell potential


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KeiannaPineda1B
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Joined: Mon Jun 17, 2019 7:24 am

Cell potential

Postby KeiannaPineda1B » Thu Mar 05, 2020 11:24 pm

How does adding water to a concentration cell affect cell potential? (in the two occasions: anode or cathode)

Daria Azizad 1K
Posts: 116
Joined: Thu Jul 25, 2019 12:15 am

Re: Cell potential

Postby Daria Azizad 1K » Thu Mar 05, 2020 11:39 pm

It will decrease the concentration. To find out how this affects cell potential, you can plug numbers into E=-RT/nF lnQ with alterations to Q. For instance, if the cathode's concentration decreases, cell potential will increase.

Anthony Hatashita 4H
Posts: 103
Joined: Wed Sep 18, 2019 12:21 am

Re: Cell potential

Postby Anthony Hatashita 4H » Fri Mar 06, 2020 12:06 am

Adding water will decrease the concentration of everyone else, changing the value of Q which changes cell potential.

Sanjana Borle 2K
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Joined: Fri Aug 09, 2019 12:15 am

Re: Cell potential

Postby Sanjana Borle 2K » Fri Mar 06, 2020 12:10 am

Adding water will dilute a solution, and depending on whether it is added to the anode or cathode, delta G, or work, may also go up or down.

cassidysong 1K
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Joined: Fri Aug 30, 2019 12:15 am

Re: Cell potential

Postby cassidysong 1K » Sun Mar 08, 2020 8:38 pm

How adding water affects cell potential is dependent on which solution it is diluting. If it is diluting the anode solution, then the overall Q is decreased, decreasing the lnQ expression and therefore increasing cell potential since the [-RTlnQ] term is smaller.

Jacob Villar 2C
Posts: 105
Joined: Sat Aug 17, 2019 12:18 am

Re: Cell potential

Postby Jacob Villar 2C » Sun Mar 08, 2020 8:39 pm

It will dilute the solution, resulting in a change in a Q value due to changes in concentration.

Veronica Lu 2H
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Re: Cell potential

Postby Veronica Lu 2H » Sun Mar 08, 2020 8:47 pm

water dilutes the solution.Whether it increases or decreases cell potential depends on the problem


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