Pt in Cell diagrams

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Deborah Cheng 1F
Posts: 50
Joined: Thu Jul 13, 2017 3:00 am

Pt in Cell diagrams

Postby Deborah Cheng 1F » Tue Feb 20, 2018 11:50 am

How do you know when it is necessary to put an electrode such as Pt on each end of the cell diagram?

Qining Jin 1F
Posts: 53
Joined: Fri Sep 29, 2017 7:07 am

Re: Pt in Cell diagrams

Postby Qining Jin 1F » Tue Feb 20, 2018 12:08 pm

Pt is necessary when both the oxidized and reduced species are in the same solution

Amanda Wu 2C
Posts: 31
Joined: Sat Jul 22, 2017 3:00 am

Re: Pt in Cell diagrams

Postby Amanda Wu 2C » Tue Feb 20, 2018 9:37 pm

There are also cases in which a Pt electrode is necessary even if one of the species is not in solution. Such an example includes I2 (s). Because it isn't a metal and is a poor conductor of electricity, it is necessary to have a Pt electrode in this case even if the species is a solid. On the opposite end of the spectrum, there are some cases in which a Pt electrode is unnecessary even if the species is a liquid as in the case of mercury (Hg (l)), which is a liquid metal capable of conducting electricity at standard temperature and conditions.

Rakhi Ratanjee 1D
Posts: 59
Joined: Fri Sep 29, 2017 7:04 am

Re: Pt in Cell diagrams

Postby Rakhi Ratanjee 1D » Tue Feb 20, 2018 11:34 pm

Aren't the oxidized and reduced species always in the same solution?

Eli Aminpour 2K
Posts: 50
Joined: Fri Sep 29, 2017 7:04 am

Re: Pt in Cell diagrams

Postby Eli Aminpour 2K » Tue Feb 20, 2018 11:37 pm

The inert electrode is necessary to make the electrons flow. You need this when the ions are aqueous or gaseous. You don't need it if there is a conducting solid.


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