Cell Diagram

Moderators: Chem_Mod, Chem_Admin

Posts: 28
Joined: Wed Sep 21, 2016 2:59 pm

Cell Diagram

Postby Tara_Hekmati_3B » Sun Feb 05, 2017 12:45 am

When writing a cell diagram, I understand that the anode is written before the cathode, but in what order do the products and reactants have to be written? When do you use commas instead of vertice lines?

Posts: 10
Joined: Sat Jul 09, 2016 3:00 am
Been upvoted: 1 time

Re: Cell Diagram

Postby Atishay_Mathur_3L » Sun Feb 05, 2017 9:13 am


There is no steadfast rule regarding the order of the reactants and products for the half reactions where both are in the same phase; however, for your own use, it may be helpful to write reactants on the left to products on the right in both the anode and cathode because you can clearly see the transfer of electrons. A single vertical line is used to denote phase changes or phase differences in the species on either side, such as between the electrode and the solvent, while a double vertical line denotes the salt bridge. A comma is used to separate species of the same phase that are in both in either the anode or cathode.
Last edited by Atishay_Mathur_3L on Sun Feb 05, 2017 7:02 pm, edited 1 time in total.

Teresa Chan 2G
Posts: 9
Joined: Wed Sep 21, 2016 2:57 pm

Re: Cell Diagram

Postby Teresa Chan 2G » Sun Feb 05, 2017 1:59 pm

Hi, I think the textbook mentions that the reactant should be on the left and products on the right. For anode/cathode, if electrons are flowing to the right (+ cell potential), then the anode is on the left and cathode on the right. If electrons are flowing to the left (- cell potential), then the cathode is on the right and anode is on the left.

Return to “Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams”

Who is online

Users browsing this forum: No registered users and 2 guests