# chemistry

posted by .

I have a question.
For Fe|Fe^+2 (1M)| Cu|Cu^+2 (1M

why did you use Fe^2+ ==> Fe^3+ + e Eo = -0.771 ?

instead of: Fe ---> Fe^+2 + 2e ?

thank you..

• chemistry -

I have used the Fe^2+ ==> Fe^3+ + e so many times it is force of habit. I just screwed up. It should be Fe ==> Fe^2+ + e. But note that I would write the cell as
Fe|Fe^2+(1M) || Cu^2+(1M)|Cu

• chemistry -

the cell is written like that in the report sheet so that's why I wrote it like that

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