Half/Rxn & Balanced Equations for galvanic cells.

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Ivan Tadeja 1G
Posts: 81
Joined: Fri Sep 28, 2018 12:28 am

Half/Rxn & Balanced Equations for galvanic cells.

Postby Ivan Tadeja 1G » Thu Mar 05, 2020 1:35 am

In homework problem 6L3, Platinum appears on both the cathode and anode side of the diagram. I was wondering what this means exactly, and what needs to be done depending on which side it's on?

Charlyn Ghoubrial 2I
Posts: 50
Joined: Wed Nov 13, 2019 12:26 am

Re: Half/Rxn & Balanced Equations for galvanic cells.

Postby Charlyn Ghoubrial 2I » Thu Mar 05, 2020 2:27 am

It just implies that none of your species are solids. They’re either (aq) or (g) if you’re talking about example d

Mandeep Garcha 2H
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am

Re: Half/Rxn & Balanced Equations for galvanic cells.

Postby Mandeep Garcha 2H » Thu Mar 05, 2020 10:28 am

Pt(s) is added to either the anode or cathode (or even both) when there is no solid metal conductor present.

805373590
Posts: 101
Joined: Wed Sep 11, 2019 12:17 am

Re: Half/Rxn & Balanced Equations for galvanic cells.

Postby 805373590 » Thu Mar 05, 2020 11:06 am

Does anyone know how to write half reactions when reducing and oxidizing agent is the same

205389184
Posts: 100
Joined: Sat Sep 07, 2019 12:18 am

Re: Half/Rxn & Balanced Equations for galvanic cells.

Postby 205389184 » Sun Mar 08, 2020 11:36 pm

we typically add platinum to either (or both) side of the cell diagram if there isn't already an electrode in it

Ivan Tadeja 1G
Posts: 81
Joined: Fri Sep 28, 2018 12:28 am

Re: Half/Rxn & Balanced Equations for galvanic cells.

Postby Ivan Tadeja 1G » Sat Mar 14, 2020 12:24 pm

Mandeep Garcha 2H wrote:Pt(s) is added to either the anode or cathode (or even both) when there is no solid metal conductor present.


Is pt the only metal that we use? at least for the purpose of what we're doing in chem 14B?

ThomasNguyen_Dis1H
Posts: 102
Joined: Fri Aug 30, 2019 12:17 am

Re: Half/Rxn & Balanced Equations for galvanic cells.

Postby ThomasNguyen_Dis1H » Sat Mar 14, 2020 12:26 pm

Cells typically need some solid electrode for it to work. So if your equation does not have a solid in it, we have to add Pt(s) at the ends of the cell diagram to show that it is the electrode that passes electrons from the anode to the cathode.

HuyHa_2H
Posts: 100
Joined: Wed Sep 11, 2019 12:15 am

Re: Half/Rxn & Balanced Equations for galvanic cells.

Postby HuyHa_2H » Sat Mar 14, 2020 12:45 pm

Cells need solids electrodes in both sides to work, so if there is no solid electrode on any side, you place solid platinum to fulfill that necessity.

preyasikumar_2L
Posts: 101
Joined: Fri Aug 09, 2019 12:17 am

Re: Half/Rxn & Balanced Equations for galvanic cells.

Postby preyasikumar_2L » Sat Mar 14, 2020 5:59 pm

Platinum is the most common electrode used in electrochemical cells when none of the species present are solid metals because it is resistant to oxidation and won't easily react in redox reactions.


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