Cell diagram help.

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Brian Kwak 1D
Posts: 88
Joined: Fri Sep 28, 2018 12:17 am

Cell diagram help.

Postby Brian Kwak 1D » Tue Feb 26, 2019 12:06 pm

I had a question about the cell diagram. If the anode or cathode has elements that do not go under a phase change we annotate it as Fe3+(aq),Fe2+(Aq)ΙPt(s) right? Also when there is no phase change and no metal we add a inert metal to the cell diagram right??

katherinemurk 2B
Posts: 68
Joined: Wed Nov 15, 2017 3:02 am

Re: Cell diagram help.

Postby katherinemurk 2B » Tue Feb 26, 2019 12:10 pm

You add an inert metal when the ions of the same element are in the same solution or when you have a gas and ion in the same solution

Cody Do 2F
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am

Re: Cell diagram help.

Postby Cody Do 2F » Tue Feb 26, 2019 12:45 pm

When an anode or cathode do not undergo a phase change, you're correct that you use a comma to separate the two instead of a bar. It is important to note that if there is a situation like this, you should place the oxidized element first and then the reduced element. Using your example, Fe3+(aq) is placed first since it's "more oxidized" (more positive, less negative) than Fe2+(aq), which is "more reduced" (less positive, more negative).

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