chornedsnorkack - 11-2-2014 at 11:37
What do you think could be a reliable and full source of electrochemical source?
Most of them tend to include only a few of the many metals. I think a logical choice would be selection out of this:
http://en.wikipedia.org/wiki/Standard_electrode_potential_%2...
however, it also includes many irrelevant and suspicious species.
My selection would be:
Li/Li+ -3,04
Cs/Cs+ -3,026
Rb/Rb+ -2,98
K/K+ -2,93
Ba/Ba2+ -2,912
Sr/Sr2+ -2,899
Ca/Ca2+ -2,868
Eu/Eu2+ -2,812
Yb/Yb2+ -2,76
Na/Na+ -2,71
Sm/Sm2+ -2,68
Tm/Tm2+ -2,4
La/La3+ -2,379
Y/Y3+ -2,372
Mg/Mg2+ -2,372
Pr/Pr3+ -2,353
Ce/Ce3+ -2,336
Er/Er3+ -2,331
Ho/Ho3+ -2,33
Nd/Nd3+ -2,323
Dy/Dy3+ -2,295
Lu/Lu3+ -2,28
Tb/Tb3+ -2,28
Gd/Gd3+ -2,279
Sc/Sc3+ -2,077
Am/Am3+ -2,048
Cm/Cm3+ -2,04
Pu/Pu3+ -2,031
Th/Th4+ -1,899
Np/Np3+ -1,856
Be/Be2+ -1,847
U/U3+ -1,798
Hf/HfO(2+) -1,724
Al/Al3+ -1,663
Ti/Ti2+ -1,63
Zr/Zr4+ -1,45
Mn/Mn2+ 1,185
V/V2+ -1,13
Nb/Nb3+ -1,099
But I already see inconsistencies here.
What are the main species, in acid solution, for Ti, Zr and Hf respectively?
Brain&Force - 11-2-2014 at 18:48
For Ti there is Ti3+, but it is a highly reducing species. Ti4+ does exist, but only in extremely acidic solution, and often as
TiO2+. Zr and Hf exist ZrO2+ and HfO2+ respectively.
TiF62- does exist in solution.
chornedsnorkack - 12-2-2014 at 02:19
Moderately strongly reducing dissolved species:
U3+/U4+ -0,52
Cr2+/Cr3+ -0,42
Eu2+/Eu3+ -0,35
V2+/V3+ -0,26
Sn2+/Sn4+ 0,15
Ti3+/TiO(2+) 0,19
V3+/VO(2+) 0,34
Mo3+/H2MoO4 0,43
Fe2+/Fe3+ 0,77
Is that correct? (I have my suspicions about Mo... and completeness).
chornedsnorkack - 15-5-2015 at 23:46
After Nb, it should go on:
Si/SiO2 -0,91
Cr/Cr2+ -0,91
B/H3BO3 -0,89
Zn/Zn2+ -0,762
Ta/Ta2O5 -0,75
Ga/Ga3+ -0,53
P/H3PO2 -0,51
Fe/Fe2+ -0,44
Cd/Cd2+ -0,40
In/In3+ -0,34
Tl/Tl+ -0,34
Co/Co2+ -0,28
Ni/Ni2+ -0,25
[Edited on 16-5-2015 by chornedsnorkack]