Predicting Standard Potential of Cells


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Tiffany_Cacy_3D
Posts: 70
Joined: Fri Sep 28, 2018 12:24 am

Predicting Standard Potential of Cells

Postby Tiffany_Cacy_3D » Sun Feb 24, 2019 5:10 pm

So in the 7th edition in section 6M there are several questions including 6M.3. which ask you to predict the standard potential of different galvanic cells. In the book there is a tabel containing many of the E/V values which you use plug into the formula Ecell=E(cathode)-E(anode) but in some cases there are no direct E/V values. How do you calculate the standard potential of each half reaction without a key?

Kriti Goyal 4K 19
Posts: 32
Joined: Fri Sep 28, 2018 12:21 am

Re: Predicting Standard Potential of Cells

Postby Kriti Goyal 4K 19 » Sun Feb 24, 2019 5:28 pm

If the value for the reverse reaction is given, you can take the negative value, which would give you the oxidation potential for the reaction you need that you can plug in the other equation, Ecell= Ered + Eox

Tiffany_Cacy_3D
Posts: 70
Joined: Fri Sep 28, 2018 12:24 am

Re: Predicting Standard Potential of Cells

Postby Tiffany_Cacy_3D » Sun Feb 24, 2019 8:18 pm

Is the reverse given? I couldn't find the values anywhere, I wasn't sure if you are maybe supposed to derive them from the ones that are given? I am not sure how to go about that though.


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