when to add Pt (s)
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Re: when to add Pt (s)
Typically you add Pt if there is no conducting metal. However, Hg(l) can also act as a conductor, so you don't need to add Pt if Hg(l) is already present in the cell.
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Re: when to add Pt (s)
you would use an inert conductor such as Pt to transfer electrons if the half reaction has no conducting solid. for example, if both the reactant and products are in solution, then you would need pt.
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Re: when to add Pt (s)
Also, as a reminder, a solid does not always mean that it is conductive. For example, I(s) is not conductive, so you would have to include Pt(s).
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Re: when to add Pt (s)
You would also add P(t) when there the oxidized and reduced species are in the same solution, e.g |Ce4+ (aq), Ce3+ (aq)| -- inert electrodes are necessary in this case.
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Re: when to add Pt (s)
Yu Jin Kwon 3L wrote:Also, as a reminder, a solid does not always mean that it is conductive. For example, I(s) is not conductive, so you would have to include Pt(s).
I was confused about that textbook problem at first, but that makes a lot of sense. Even though I is a solid, it's a nonmetal, and cathodes must be conducting METALS. So one would need to put Pt(s) in the cell diagram to act as the necessary metal electrode. Similarly, Hg(l) is another exception which acts as a conductor, so Pt(s) is technically unnecessary when you have Hg(l) as the electrode.
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Re: when to add Pt (s)
You add Pt(s) or another inert metal into the cell diagram when there isn't a conducting metal present in the cathode or anode side.
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Re: when to add Pt (s)
We add Pt(s) (or a different inert conductor) if there is no conducting metal for the anode/cathode.
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Re: when to add Pt (s)
When there is no conducing metal present in solution you add Pt(s),most common electrode added.
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Re: when to add Pt (s)
You would add Pt whenever one there is no conducting metal present. An example provided by Dr. Lavelle would be Ag(s)|AgBr(s)||Br(aq)|Br2 (g). Because the right side (the cathode) does not contain a conducting metal already, you would procede to add a platinum rod to that side.
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Re: when to add Pt (s)
I agree with the previous posts! You add P(t) when there are no metals in the reaction that are conductors.
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Re: when to add Pt (s)
You typically add Pt as an electrode when there is no conducting metal electrode on one side of the cell (i.e a gas). For example, a Pt electrode is used in a standard hydrogen electrode.
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Re: when to add Pt (s)
You add Pt(s) when there's no conducting metal present on the cathode/anode part of a cell. For example, when both oxidized and reduced species are in aqueous state or when a solid is a not conducting, such as I2(s).
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Re: when to add Pt (s)
Pt(s) is added when there is no conducting metal on either side of the cell ( anode and cathode).
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Re: when to add Pt (s)
Hi! You would add Pt(s) at the end of a cell diagram if a conducting solid is not present.
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Re: when to add Pt (s)
Pt is added on the side of the cell diagram that doesn't have a conducting metal.
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Re: when to add Pt (s)
You add pt to the sides with no conducting metal. Mg is also an exception and can conduct even though it’s a liquid.
Re: when to add Pt (s)
You need to be checking each side of the cell diagram for a conducting metal. If you don’t have one we can use Pt or other inert conductors
Re: when to add Pt (s)
Typically when there is no conducting metal on that certain side. It is used as an inert conductor.
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