6M.7

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Hailey Kim 4G
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6M.7

Postby Hailey Kim 4G » Tue Feb 25, 2020 1:31 pm

For homework problem 6M.7 part a, how do you know which standard reduction potential you should use for Cr? When Cr loses 2 e-, the standard reduction potential is -0.91, but when it loses 3 e-, it is -0.74. The one I use will determine if Cr is a stronger reducing agent than Zn.

Chem_Mod
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Re: 6M.7

Postby Chem_Mod » Thu Feb 27, 2020 12:25 pm

Can you please post the question.

Hannah Lee 2F
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Re: 6M.7

Postby Hannah Lee 2F » Fri Feb 28, 2020 7:45 pm

I am also confused about this. For reference, here is the question: Arrange the following metals in order of increasing strength as reducing agents for species in aqueous solution: (a) Cu, Zn, Cr, Fe; (b) Li, Na, K, Mg; (c) U, V, Ti, Al; (d) Ni, Sn, Au, Ag.

Hailey Kim 4G
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Joined: Sat Jul 20, 2019 12:16 am

Re: 6M.7

Postby Hailey Kim 4G » Mon Mar 02, 2020 3:50 pm

Chem_Mod wrote:Can you please post the question.


6M.7 Arrange the following metals in order of increasing strength as reducing agents for species in aqueous solution:
(a) Cu, Zn, Cr, Fe

Hannah Lee 2F
Posts: 117
Joined: Thu Jul 11, 2019 12:15 am

Re: 6M.7

Postby Hannah Lee 2F » Mon Mar 02, 2020 6:11 pm

I'm assuming that we won't encounter a problem like this on the test. If we have to order by reducing or oxidizing power, Dr. Lavelle will provide us with the oxidation states or specify them in some way.

Charlyn Ghoubrial 2I
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Re: 6M.7

Postby Charlyn Ghoubrial 2I » Mon Mar 02, 2020 8:39 pm

A lot of people have also been asking similar questions and it seems like no one really knows so either Dr Lavelle will provide us with the information on the test or I’m just going to try to see if there is a pattern to which one to use from all the questions and answer key in the textbook


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