Cell Diagram, what to include

[Payton Kammerer 2B]

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?

[805422680]

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]

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

[Sydney Myers 4I]

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.