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Cell diagrams and solids

Posted: Fri Mar 01, 2019 9:51 am
by Arman M 1A
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)?

Re: Cell diagrams and solids

Posted: Fri Mar 01, 2019 10:59 am
by Iris Bai 2K
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.

Re: Cell diagrams and solids

Posted: Sat Mar 02, 2019 7:02 pm
by Henry Dudley 1G
So if there is a solid in the reaction then you don't include Pt at the end?

Re: Cell diagrams and solids

Posted: Sat Mar 02, 2019 9:09 pm
by Timothy_Yueh_4L
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.

Re: Cell diagrams and solids

Posted: Sun Mar 03, 2019 2:03 pm
by Riley Dean 2D
More often than not the solid used is going to be platinum but you can also use graphite as a conducting solid

Re: Cell diagrams and solids

Posted: Sun Mar 03, 2019 2:06 pm
by Melissa Bu 1B
If there is a solid or liquid (like Hg (mercury)), an inert solid like Pt(s) is not needed

Re: Cell diagrams and solids

Posted: Sun Mar 03, 2019 3:10 pm
by Anmol_cheema_2F
Usually an inert solid like Platinum is added when a solution does not already have a conducting solid.

Re: Cell diagrams and solids

Posted: Sun Mar 03, 2019 7:32 pm
by George Ghaly 2L
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.

Re: Cell diagrams and solids

Posted: Sun Mar 03, 2019 8:48 pm
by Chloe Likwong 2K
You would want a metal solid to be the electrode. Pt(s) is inert so it's the usual go-to.

Re: Cell diagrams and solids

Posted: Sun Mar 03, 2019 9:05 pm
by Jonathan Pai 2I
You need Pt if there is not a solid electrode present.