Creating a Cell Diagram with solids

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Sammy Thatipelli 1B
Posts: 63
Joined: Thu Jul 27, 2017 3:01 am
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Creating a Cell Diagram with solids

Postby Sammy Thatipelli 1B » Thu Feb 22, 2018 8:24 pm

When do we use platinum in our cell diagrams, and is there another solid that we can choose from for our diagram? Can someone list the rules/cases in which we include platinum (or other solids) in our diagrams?

Hannah Guo 3D
Posts: 56
Joined: Fri Sep 29, 2017 7:06 am

Re: Creating a Cell Diagram with solids

Postby Hannah Guo 3D » Thu Feb 22, 2018 9:16 pm

If the half reaction doesn't have a solid metal, then we need Pt to act as the electrode. Lavelle also mentioned that sometimes people use graphite as an electrode, but generally we still use Pt. In some rare cases, if there is liquid Hg in the half reaction, then we can use it as an electrode.
In cell diagram, we use a single line to separate the electrode from reactants and products. Even when there is a solid in the reactants or products, we still need to use a single line to separate this solid from the solid electrode.
Hope this helps!

Christy Zhao 1H
Posts: 50
Joined: Fri Sep 29, 2017 7:07 am

Re: Creating a Cell Diagram with solids

Postby Christy Zhao 1H » Sat Feb 24, 2018 9:38 pm

Are there any other special cases like liquid Hg where it can be considered as an electrode?


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