Page 1 of 1

### Writing cell diagram: figuring out order

Posted: Thu Feb 04, 2016 9:59 am
When Writing a Cell Diagram, how do we know which order to put the different molecules of the anodes and cathodes in? For instance with the anode: Ag --->Ag+ + e- and the cathode: O3 + H2O + 2e- ---> O2 + 2OH- , the cell diagram is: Ag(s)|Ag+(aq)||OH-(aq)|O3(g),O2(g)|Pt(s)
My question is: why is Ag placed before Ag+ in th cell diagram? And why is OH- placed before O3 and O3 before O2 in the cell diagram? Does this order matter? Or does it only matter that anode on left and cathode on right?

### Re: Writing cell diagram: figuring out order

Posted: Thu Feb 04, 2016 10:25 am
so the order goes anode to cathode. the anode is the molecule being oxidized which silver because it loses an electron. It goes from Ag to Ag+. That is why the cell diagram starts with Ag.

Armin Ghomeshi

### Re: Writing cell diagram: figuring out order

Posted: Sat Feb 06, 2016 10:16 pm
OH- is placed to the left of the Oxygens because it represents the solution that is connected to the salt bridge.