Calculating potentials for reactions that have only reduction or only oxidation

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Isa Samad 1L
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Calculating potentials for reactions that have only reduction or only oxidation

Postby Isa Samad 1L » Sat Mar 10, 2018 11:16 am

I was wondering how we would calculate the potential of a reaction that has only reduction or only oxidation? For example, the reaction
Cr2O7(2-) + 14H+ + 12e- --> 2Cr(s) + 7H2O is the sum of the two half reactions:
1. Cr2O7(2-) + 14H+ + 6e- ----> 2Cr(3+) + 7H2O
2. 2Cr(3+) + 6e- ---> 2Cr(s)

Ammar Amjad 1L
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Re: Calculating potentials for reactions that have only reduction or only oxidation

Postby Ammar Amjad 1L » Sat Mar 10, 2018 11:36 am

The way you'd do this problem is similar to how you'd problem number 27 from chapter 14. I have a picture of my work for this specific problem, so I've attached it. Hope it helps.
Attachments
IMG_20180302_0002.pdf
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