look at a table of reduction potentials....
http://www.chemeddl.org/services/moodle/media/QBank/GenChem/Tables/EStandardTable.htm
Determine the order of reducing agents (strongest to weakest).
A) Mn(s) > Zn(s) > Cr(s) > Fe(s)
B) Fe(s) > Cr(s) > Zn(s) > Mn(s)
C) Mn(s) > Fe(s) > Cr(s) > Zn(s)
D) Zn(s) > Mn(s) > Cr(s) > Fe(s)
I know the half reaction for the following:
- Mn(s) ==> Mn^2+(aq) + 2e-
- Zn(s) ==> Zn^2+(aq) + 2e-
- Cr(s) ==> Cr^3+(aq) + 3e-
- Fe(s) ==> Fe^2+(aq) + 2e-
I am not really sure how to tell which one is stronger than the other.
2 answers
So the one with lowest value is the strongest? Ex: Mn(s) is -1.18