Electrolytic Cell Chemistry Qbank 2 Solutions, Acids, and Electrochemistry

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ma986
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Electrolytic Cell Chemistry Qbank 2 Solutions, Acids, and Electrochemistry

Post by ma986 » Thu Jun 14, 2018 3:41 pm

Hello,


I just wanted to clarify the answer for question 36. It is asking for E°cell, or the standard-state cell potential and I thought that the equation for this is E(red) - E(cat). But the explanation shows addition of the two values.


Thank you,
Maria
NS_Tutor_Katelyn
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Re: Electrolytic Cell Chemistry Qbank 2 Solutions, Acids, and Electrochemistry

Post by NS_Tutor_Katelyn » Wed Jun 20, 2018 1:02 pm

ma986 wrote:Hello,


I just wanted to clarify the answer for question 36. It is asking for E°cell, or the standard-state cell potential and I thought that the equation for this is E(red) - E(cat). But the explanation shows addition of the two values.


Thank you,
Maria
You can calculate cell potential one of two ways: subtracting the reduction potential of the oxidized compound from the reduction potential of the reduced compound, or you can add the reduction potential of the reduced compound to the oxidation potential of the oxidized compound. The oxidation potential is simple the negative of the reduction potential. The did the second approach, but the first approach would yield the same answer.

Let me know if that helps!

-Kate
Katelyn Sawyer
Senior Tutor
katelyn@nextsteptestprep.com
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