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6M.7
Posted: Tue Feb 25, 2020 1:31 pm
by Hailey Kim 4G
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.
Re: 6M.7
Posted: Thu Feb 27, 2020 12:25 pm
by Chem_Mod
Can you please post the question.
Re: 6M.7
Posted: Fri Feb 28, 2020 7:45 pm
by Hannah Lee 2F
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.
Re: 6M.7
Posted: Mon Mar 02, 2020 3:50 pm
by Hailey Kim 4G
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
Re: 6M.7
Posted: Mon Mar 02, 2020 6:11 pm
by Hannah Lee 2F
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.
Re: 6M.7
Posted: Mon Mar 02, 2020 8:39 pm
by Charlyn Ghoubrial 2I
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