Cell diagrams and solids

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Arman M 1A
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Cell diagrams and solids

Postby Arman M 1A » Fri Mar 01, 2019 9:51 am

In a cell diagram, when do you include a solid and why do we have to include a solid? Also, Is the solid always going to be Pt(s)?

Iris Bai 2K
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Re: Cell diagrams and solids

Postby Iris Bai 2K » Fri Mar 01, 2019 10:59 am

There always needs to be a conducting solid so that there is a path for the electrons to move across. The solid is only Pt (s) when none of the species in the half reaction are a solid conducting metal.

Henry Dudley 1G
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Re: Cell diagrams and solids

Postby Henry Dudley 1G » Sat Mar 02, 2019 7:02 pm

So if there is a solid in the reaction then you don't include Pt at the end?

Timothy_Yueh_4L
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Re: Cell diagrams and solids

Postby Timothy_Yueh_4L » Sat Mar 02, 2019 9:09 pm

Henry Dudley 1G wrote:So if there is a solid in the reaction then you don't include Pt at the end?

If the elements undergoing redox reactions are present in solid form (electrodes composed of those elements), then a conducting solid such as platinum is not needed however if if they are not in solid form, rather in a gaseous or aqueous state, the reaction will require a conducting solid.

Riley Dean 2D
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Re: Cell diagrams and solids

Postby Riley Dean 2D » Sun Mar 03, 2019 2:03 pm

More often than not the solid used is going to be platinum but you can also use graphite as a conducting solid

Melissa Bu 1B
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Re: Cell diagrams and solids

Postby Melissa Bu 1B » Sun Mar 03, 2019 2:06 pm

If there is a solid or liquid (like Hg (mercury)), an inert solid like Pt(s) is not needed

Anmol_cheema_2F
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Re: Cell diagrams and solids

Postby Anmol_cheema_2F » Sun Mar 03, 2019 3:10 pm

Usually an inert solid like Platinum is added when a solution does not already have a conducting solid.

George Ghaly 2L
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Re: Cell diagrams and solids

Postby George Ghaly 2L » Sun Mar 03, 2019 7:32 pm

The electrons can not be conducted by themselves therefore an inert solid like Platinum could be used to transfer the electrons over to the other side.

Chloe Likwong 2K
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Re: Cell diagrams and solids

Postby Chloe Likwong 2K » Sun Mar 03, 2019 8:48 pm

You would want a metal solid to be the electrode. Pt(s) is inert so it's the usual go-to.

Jonathan Pai 2I
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Re: Cell diagrams and solids

Postby Jonathan Pai 2I » Sun Mar 03, 2019 9:05 pm

You need Pt if there is not a solid electrode present.


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