moles of electrons of reaction

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Andie Jian 1D
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Joined: Fri Sep 28, 2018 12:17 am
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moles of electrons of reaction

Postby Andie Jian 1D » Wed Feb 27, 2019 2:21 am

When using the equation , does the number of moles of electrons we plug in depend on the moles of ions we start out with? Or do we only look at the moles of electrons transferred within the overall reaction?

Albert_Luu3K
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am

Re: moles of electrons of reaction

Postby Albert_Luu3K » Wed Feb 27, 2019 4:55 am

Not sure if I understand your question, but you should look at both! For example if 2Ce^4+(aq) --> 2Ce^3+(aq), then n should equal 2. Even though one electron was needed to lower the charge, there were two moles of the ions.

Philipp_V_Dis1K
Posts: 32
Joined: Fri Sep 28, 2018 12:20 am

Re: moles of electrons of reaction

Postby Philipp_V_Dis1K » Wed Feb 27, 2019 4:38 pm

usually one can look at the amount of electrons in the redox half reaction, which shows how many moles of electrons were used.

Arta Kasaeian 2C
Posts: 30
Joined: Mon Jan 07, 2019 8:22 am

Re: moles of electrons of reaction

Postby Arta Kasaeian 2C » Wed Feb 27, 2019 4:42 pm

n is the number of electrons transferred, to find it you would find the two half reactions, and balance them out for an equal #e. for example if cathode reaction has 2e transfer and anode reaction has 3e transfer, you would balance them for both of them to have a 6e transfer, in which case your n would be 6.


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