## Nernst equation and K

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

Jorja De Jesus 2C
Posts: 121
Joined: Sat Jul 20, 2019 12:15 am

### Nernst equation and K

When would you use K instead of Q? Does the electron flow stop at equilibrium? If so why use K?

Jacey Yang 1F
Posts: 101
Joined: Fri Aug 09, 2019 12:17 am

### Re: Nernst equation and K

You use K when the concentrations of products and reactants are at equilibrium. Electron flow stops at equilibrium because the voltage drops down to 0.

Hui Qiao Wu 1I
Posts: 56
Joined: Fri Aug 30, 2019 12:16 am

### Re: Nernst equation and K

K represents the reaction is at equilibrium.

Alexandra Bartolome 2H
Posts: 102
Joined: Sat Jul 20, 2019 12:17 am

### Re: Nernst equation and K

K is used for redox reactions at equilibrium since K is the equilibrium constant. Electron flow does stop at equilibrium since the concentration changes to the point where Q = K and the cell potential becomes 0.

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