## Cell potential

$E_{cell} = E_{cell}^{\circ}-\frac{RT}{nF}\ln Q$

KeiannaPineda1B
Posts: 51
Joined: Mon Jun 17, 2019 7:24 am

### Cell potential

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

Posts: 116
Joined: Thu Jul 25, 2019 12:15 am

### Re: Cell potential

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

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

Sanjana Borle 2K
Posts: 111
Joined: Fri Aug 09, 2019 12:15 am

### Re: Cell potential

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
Posts: 100
Joined: Fri Aug 30, 2019 12:15 am

### Re: Cell potential

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

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

Veronica Lu 2H
Posts: 89
Joined: Wed Sep 18, 2019 12:18 am
Been upvoted: 1 time

### Re: Cell potential

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

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

### Who is online

Users browsing this forum: No registered users and 0 guests