Inert Electrodes

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RuchaDeshpande1L
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Inert Electrodes

Postby RuchaDeshpande1L » Thu Feb 22, 2018 6:38 pm

The solutions manual mentions that inert electrodes are necessary for gas/ion electrode reactions. What are all possible situations where we would need an inert electrode? Would we be marked down if we included an inert electrode in the cell diagram where it wasn’t necessary?

Vincent Tse 1K
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Re: Inert Electrodes

Postby Vincent Tse 1K » Thu Feb 22, 2018 6:53 pm

I'm not entirely sure about all the scenarios, but I suppose you would need an inert electrode whenever you don't want the electrode messing up the reaction, as in, you only want it to transfer electrons instead of exchanging ions. That's typically the situation for gas/ion electrode reactions. As for grading, idk--anyone else know?

allyz1F
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Re: Inert Electrodes

Postby allyz1F » Thu Feb 22, 2018 9:06 pm

What about for salt bridges too? When do you know to include a salt bridge in the cell diagram and when is it not necessary?

Patricia Macalalag 2E
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Re: Inert Electrodes

Postby Patricia Macalalag 2E » Fri Feb 23, 2018 12:38 am

allyz1F wrote:What about for salt bridges too? When do you know to include a salt bridge in the cell diagram and when is it not necessary?


The salt bridge maintains the charges between the anode and cathode so the reaction can happen, but you don't always have to use a salt bridge. Porous disks work as well.

Mitch Walters
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Re: Inert Electrodes

Postby Mitch Walters » Fri Feb 23, 2018 1:06 am

Draw the salt bridge to show that you have finished the oxidation portion of the reaction, and that you are moving onto the reduction portion.


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