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Ranking in order of increasing reducing power

Posted: Sun Mar 10, 2019 3:22 pm
by Kassidy Tran 1E
How do you rank an element in order from increasing reducing power going from their neutral state to second oxidation state? For example, for the elements Pt, Pb, Cu.

Re: Ranking in order of increasing reducing power

Posted: Sun Mar 10, 2019 3:41 pm
by Timothy_Yueh_4L
You would rank them according to decreasing standard reduction potential (+ --> -). This is because the lower the reduction potential, the stronger the oxidation potential therefore when finding the element with the strongest reducing power we want the element with the highest reduction potential which is best at driving the reduction half reaction.

Re: Ranking in order of increasing reducing power

Posted: Sun Mar 10, 2019 3:50 pm
by Edward Xie 2E
For increasing reducing power, you would list them in order of decreasing reduction potential.

Pt (Eo = 1.20 V) < Cu (Eo = 0.34 V) < Pb (Eo = -0.13 V)

Re: Ranking in order of increasing reducing power

Posted: Sun Mar 10, 2019 7:28 pm
by Abby-Hile-1F
How do you tell if something will have reducing or oxidizing power, I know it depends on the sign of E, but which is which?

Re: Ranking in order of increasing reducing power

Posted: Thu Mar 14, 2019 10:23 pm
by Joonsoo Kim 4L
I believe that if E(red) is strongly positive, the reaction favors reduction, so it would be a good oxidizing agent. Contrarily, if E(red) is strongly negative, the reaction favors oxidation, so it would be a good reducing agent.

Re: Ranking in order of increasing reducing power

Posted: Fri Mar 15, 2019 8:04 pm
by Abby-Hile-1F
Joonsoo Kim 4L wrote:I believe that if E(red) is strongly positive, the reaction favors reduction, so it would be a good oxidizing agent. Contrarily, if E(red) is strongly negative, the reaction favors oxidation, so it would be a good reducing agent.

Ok yeah that makes sense, thank you!

Re: Ranking in order of increasing reducing power

Posted: Fri Mar 15, 2019 9:14 pm
by Nghi Nguyen 2L
decreasing reduction potential, which means increasing oxidation reaction, which means increasing reducing power