Question 14.25

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Daniel Fernandez 3H
Posts: 21
Joined: Sat Jul 09, 2016 3:00 am

Question 14.25

Postby Daniel Fernandez 3H » Sat Feb 11, 2017 11:57 pm

I had a question on 14.25
Arrange the following metals in order of increasing strength as reducing agents for species in aqueous solution:
(a) Cu, Zn, Cr, Fe;
For (a) why is the answer Cu <Fe < Zn < Cr?
Isn't Zn the most electronegative,which would make it grab electrons at a higher strength than the other ones?
Thank you

Sarahi Arellano
Posts: 6
Joined: Wed Sep 21, 2016 2:59 pm

Re: Question 14.25

Postby Sarahi Arellano » Sun Feb 12, 2017 12:04 am

I think that it is because of the electron configuration if you look at Zn it has 3d104s2 so it's full while Cr has 3d54s1 incomplete

Rachel Kipp 1I
Posts: 16
Joined: Wed Sep 21, 2016 2:55 pm

Re: Question 14.25

Postby Rachel Kipp 1I » Sun Feb 12, 2017 12:14 am

For this question, look in appendix 2B and look for the most negative standard reduction potentials. Since we subtract cathode - anode, we want the most negative standard reduction potential in order to have a more positive E and therefore stronger reducing agent.

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