homework question 6M.3

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Jade Hinds 2B
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Joined: Tue Sep 10, 2019 12:16 am

homework question 6M.3

Postby Jade Hinds 2B » Mon Feb 24, 2020 10:00 pm

predict the standard potential of each of the following galvanic cells:
(a) Pt I Cr^3+, Cr^2+ II Cu^2+ I Cu

(b) Ag I AgI I I^- II Cl^- I AgCl I Ag

(c) Hg I Hg2Cl2 I Cl- II Hg2 ^2+ I Hg

(d) C I Sn^4+, Sn^2+ II Pb^4+, Pb^2+ I Pt

Posts: 103
Joined: Fri Aug 30, 2019 12:18 am

Re: homework question 6M.3

Postby nicole-2B » Tue Feb 25, 2020 8:33 pm

galvanic cells have a positive potential difference so find the cathode and anode that makes E (naught) cell positive using the equation E(naught) cell= E (naught) cathode- E(naught) anode

Jainam Shah 4I
Posts: 130
Joined: Fri Aug 30, 2019 12:16 am

Re: homework question 6M.3

Postby Jainam Shah 4I » Tue Feb 25, 2020 8:54 pm

Use the cell diagrams to come up with the reduction and oxidization half reactions. From that go to Appendix 2B and find the standard potential differences for each reaction. Use Ecathode-Eanode to find the Ecell and don't reverse the potentials from the appendix, because the equation already accounts for the reversal. You are also free to use Ecathode+Eanode, but then you have to reverse the reduction potential for the oxidation half reaction and then add.

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