Pt

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Sofia Ban
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Joined: Fri Sep 28, 2018 12:25 am

Pt

Postby Sofia Ban » Sat Feb 22, 2020 9:50 am

In the cell diagrams, what does "Pt(s)" mean? And how does this change how we set up the diagram or chemical reaction equations?

705302428
Posts: 50
Joined: Sat Aug 24, 2019 12:16 am

Re: Pt

Postby 705302428 » Sat Feb 22, 2020 10:03 am

Pt meant platinum and it was used as an inert conductor/electrode to transfer electrons. We include it in the cell diagram on the cathode side.

Wendy 1E
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Re: Pt

Postby Wendy 1E » Sat Feb 22, 2020 10:29 am

As mentioned, Pt stands for platinum. It is used as an inert conductor to transfer electrons when a half-reaction has no conducting solids. Platinum is written on the outermost part of the cathode side because it is a solid.

Jasmine Kim 1L
Posts: 71
Joined: Fri Aug 02, 2019 12:16 am

Re: Pt

Postby Jasmine Kim 1L » Sat Feb 22, 2020 11:04 am

705302428 wrote:Pt meant platinum and it was used as an inert conductor/electrode to transfer electrons. We include it in the cell diagram on the cathode side.

But some problems in the textbook have Pt(s) on the anode side or both sides (6L.3 (d) and (e)). Why do some have it only on the cathode or anode side and others on both?

Verity Lai 2K
Posts: 100
Joined: Sat Aug 24, 2019 12:18 am

Re: Pt

Postby Verity Lai 2K » Sat Feb 22, 2020 11:10 am

Pt (platinum) is used in examples like the one Lavelle discussed in class on friday where the redox reaction has two aqueous solutions that change charge without a solid, such as Fe. The platinum helps facilitate the reaction because otherwise there would be not way for the electrons to be transferred.

Ellis Song 4I
Posts: 102
Joined: Thu Jul 11, 2019 12:17 am

Re: Pt

Postby Ellis Song 4I » Sat Feb 22, 2020 11:15 am

It means platinum and is used as a inert conductor as electrode to transfer electrons. Graphite can also be used the same way.

Madeline Phan 1E
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Joined: Sat Aug 17, 2019 12:18 am

Re: Pt

Postby Madeline Phan 1E » Sat Feb 22, 2020 12:04 pm

Pt stands for platinum and is used as an inert conductor in cell diagrams.

Betania Hernandez 2E
Posts: 107
Joined: Fri Aug 02, 2019 12:15 am

Re: Pt

Postby Betania Hernandez 2E » Sat Feb 22, 2020 12:08 pm

Jasmine Kim 1L wrote:But some problems in the textbook have Pt(s) on the anode side or both sides (6L.3 (d) and (e)). Why do some have it only on the cathode or anode side and others on both?


Each side of the cell diagram needs to have a conducting solid. In the problems that have Platinum on only one side, there already exists a conducting solid on the either.


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