Cell Diagram, what to include

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Payton Kammerer 2B
Posts: 49
Joined: Tue May 01, 2018 3:00 am

Cell Diagram, what to include

Postby Payton Kammerer 2B » Sun Feb 23, 2020 5:59 pm

For the rxn 2No3- + 8H+ + 6Hg(l) -> 3Hg2^2+ + 2NO(g) + 4H20(l), the cell diagram given by the solutions manual was Hg|Hg2^2+||No3-, H+|NO(g)|Pt(s)

I'm confused about the right hand side of the cell diagram. Why is Hydrogen included? Why are there three separate sections? How do I tell that I should add a Pt(s) conductor, and why wasn't it added to the other side? The other side had all aqueous particles, no solids to connect to the Pt(s). What's happening?

Posts: 103
Joined: Sat Sep 14, 2019 12:16 am

Re: Cell Diagram, what to include

Postby 805422680 » Sun Feb 23, 2020 8:59 pm

the order of a cell diagram is Anode(solid|gas| liquid )|| Cathode (liquid| gas| solid). the solid here is the electrode. if you are not told that any of the elements are solid, you assume the electrode to be an inert Pt electrode. If you follow this outline, you should have no problems with cell diagrams

Daniel Chen 2L
Posts: 101
Joined: Fri Aug 30, 2019 12:15 am

Re: Cell Diagram, what to include

Postby Daniel Chen 2L » Sun Feb 23, 2020 9:44 pm

There can also be acidic and basic redox reactions. So that's why there may be H+ ions?

Sydney Myers 4I
Posts: 100
Joined: Fri Aug 09, 2019 12:17 am

Re: Cell Diagram, what to include

Postby Sydney Myers 4I » Sun Feb 23, 2020 9:49 pm

There are three separate sections on the right because there are three different phases represented. They are all in contact with each other, just different phases.

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