Changing the mass of electrodes

$aR \to bP, Rate = -\frac{1}{a} \frac{d[R]}{dt} = \frac{1}{b}\frac{d[P]}{dt}$

Tracy Tolentino_2E
Posts: 140
Joined: Sat Sep 07, 2019 12:17 am

Changing the mass of electrodes

In Test 2, there was a problem that asked me what happens to the E(cell) if the mass of the anode is halved. What does happen to E(cell) if you change the mass or concentration of the electrode?

Shimei_2F
Posts: 100
Joined: Fri Aug 09, 2019 12:17 am

Re: Changing the mass of electrodes

Mass doesn't affect the E(cell) but concentration does.

Posts: 53
Joined: Fri Aug 02, 2019 12:16 am

Re: Changing the mass of electrodes

I believe that nothing changes in the reaction. Equilibrium/rate is not affected because solid electrodes are not components of the expression for Q or K.

Niharika 1H
Posts: 50
Joined: Thu Jul 25, 2019 12:16 am

Re: Changing the mass of electrodes

If the mass of the anode was halved, this would not affect the Ecell value, because the concentration would remain the same.

Orrin Zhong 4G
Posts: 51
Joined: Sat Jul 20, 2019 12:16 am

Re: Changing the mass of electrodes

Changing the mass of the electrode does not change E(cell), but changing the concentrations of the reactants and products or the temperature of the reaction does change E(cell). You can see this by the variables that participate in the Nernst equation.
Last edited by Orrin Zhong 4G on Sun Mar 08, 2020 11:05 pm, edited 2 times in total.

RasikaObla_4I
Posts: 100
Joined: Thu Jul 25, 2019 12:15 am

Re: Changing the mass of electrodes

Changing the mass would not affect the Ecell because in the Nernst equation, which is used to calculate the Ecell, the mass is not incorporated into the equation.

SimranSangha4I
Posts: 99
Joined: Sat Sep 14, 2019 12:17 am

Re: Changing the mass of electrodes

When halved, the concentration would not be changed so the Ecell wouldn't be changed.