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Standard Electrode (Half-Cell) Potentials
Half-Reaction E ° (V)
Ag + + e Ag +0.7996
AgCl + e Ag + Cl +0.22233
[ Ag ( CN ) 2 ] + e Ag + 2 CN −0.31
Ag 2 CrO 4 + 2 e 2 Ag + CrO 4 2− +0.45
[ Ag ( NH 3 ) 2 ] + + e Ag + 2 NH 3 +0.373
[ Ag ( S 2 O 3 ) 2 ] 3+ + e Ag + 2S 2 O 3 2− +0.017
[ AlF 6 ] 3− + 3 e Al + 6 F −2.07
Al 3+ + 3 e Al −1.662
Am 3+ + 3 e Am −2.048
Au 3+ + 3 e Au +1.498
Au + + e Au +1.692
Ba 2+ + 2 e Ba −2.912
Be 2+ + 2 e Be −1.847
Br 2 ( a q ) + 2 e 2 Br +1.0873
Ca 2+ + 2 e Ca −2.868
Ce 3 + 3 e Ce −2.483
Ce 4+ + e Ce 3+ +1.61
Cd 2+ + 2 e Cd −0.4030
[ Cd ( CN ) 4 ] 2− + 2 e Cd + 4 CN −1.09
[ Cd ( NH 3 ) 4 ] 2+ + 2 e Cd + 4 NH 3 −0.61
CdS + 2 e Cd + S 2− −1.17
Cl 2 + 2 e 2 Cl +1.35827
ClO 4 + H 2 O + 2 e ClO 3 + 2 OH +0.36
ClO 3 + H 2 O + 2 e ClO 2 + 2 OH +0.33
ClO 2 + H 2 O + 2 e ClO + 2 OH +0.66
ClO + H 2 O + 2 e Cl + 2 OH +0.89
ClO 4 + 2 H 3 O + + 2 e ClO 3 + 3 H 2 O +1.189
ClO 3 + 3 H 3 O + + 2 e HClO 2 + 4 H 2 O +1.21
HClO + H 3 O + + 2 e Cl + 2 H 2 O +1.482
HClO + H 3 O + + e 1 2 Cl 2 + 2 H 2 O +1.611
HClO 2 + 2 H 3 O + + 2 e HClO + 3 H 2 O +1.628
Co 3+ + e Co 2+ ( 2 mol // H 2 SO 4 ) +1.83
Co 2+ + 2 e Co −0.28
[ Co ( NH 3 ) 6 ] 3+ + e [ Co ( NH 3 ) 6 ] 2+ +0.1
Co ( OH ) 3 + e Co ( OH ) 2 + OH +0.17
Cr 3 + 3 e Cr −0.744
Cr 3+ + e Cr 2+ −0.407
Cr 2+ + 2 e Cr −0.913
[ Cu ( CN ) 2 ] + e Cu + 2 CN −0.43
CrO 4 2− + 4 H 2 O + 3 e Cr ( OH ) 3 + 5 OH −0.13
Cr 2 O 7 2− + 14 H 3 O + + 6 e 2 Cr 3+ + 21 H 2 O +1.232
[ Cr ( OH ) 4 ] + 3 e Cr + 4 OH −1.2
Cr ( OH ) 3 + 3 e Cr + 3 OH −1.48
Cu 2+ + e Cu + +0.153
Cu 2+ + 2 e Cu +0.34
Cu + + e Cu +0.521
F 2 + 2 e 2 F +2.866
Fe 2+ + 2 e Fe −0.447
Fe 3+ + e Fe 2+ +0.771
[ Fe ( CN ) 6 ] 3− + e [ Fe ( CN ) 6 ] 4− +0.36
Fe ( OH ) 2 + 2 e Fe + 2 OH −0.88
FeS + 2 e Fe + S 2− −1.01
Ga 3+ + 3 e Ga −0.549
Gd 3+ + 3 e Gd −2.279
1 2 H 2 + e H −2.23
2 H 2 O + 2 e H 2 + 2 OH −0.8277
H 2 O 2 + 2 H 3 O + + 2 e 4 H 2 O +1.776
2 H 3 O + + 2 e H 2 + 2 H 2 O 0.00
HO 2 + H 2 O + 2 e 3 OH +0.878
Hf 4+ + 4 e Hf −1.55
Hg 2+ + 2 e Hg +0.851
2 Hg 2+ + 2 e Hg 2 2+ +0.92
Hg 2 2+ + 2 e 2 Hg +0.7973
[ HgBr 4 ] 2− + 2 e Hg + 4 Br +0.21
Hg 2 Cl 2 + 2 e 2 Hg + 2 Cl +0.26808
[ Hg ( CN ) 4 ] 2− + 2e Hg + 4CN −0.37
[ HgI 4 ] 2− + 2e Hg + 4I −0.04
HgS + 2e Hg + S 2− −0.70
I 2 + 2e 2I +0.5355
In 3+ + 3e In −0.3382
K + + e K −2.931
La 3+ + 3e La −2.52
Li + + e Li −3.04
Lu 3+ + 3e Lu −2.28
Mg 2+ + 2e Mg −2.372
Mn 2+ + 2e Mn −1.185
MnO 2 + 2H 2 O + 2e Mn ( OH ) 2 + 2OH −0.05
MnO 4 + 2H 2 O + 3e MnO 2 + 4OH +0.558
MnO 2 + 4 H + + 2 e Mn 2+ + 2 H 2 O +1.23
MnO 4 + 8 H + + 5 e Mn 2+ + 4 H 2 O +1.507
Na + + e Na −2.71
Nd 3+ + 3e Nd −2.323
Ni 2+ + 2e Ni −0.257
[ Ni ( NH 3 ) 6 ] 2+ + 2e Ni + 6NH 3 −0.49
NiO 2 + 4 H + + 2 e Ni 2+ + 2 H 2 O +1.593
NiO 2 + 2H 2 O + 2e Ni ( OH ) 2 + 2OH +0.49
NiS + 2e Ni + S 2− +0.76
NO 3 + 4 H + + 3 e NO + 2 H 2 O +0.957
NO 3 + 3 H + + 2 e HNO 2 + H 2 O +0.92
NO 3 + H 2 O + 2e NO 2 + 2OH +0.10
Np 3+ + 3e Np −1.856
O 2 + 2H 2 O + 4e 4OH +0.401
O 2 + 2 H + + 2 e H 2 O 2 +0.695
O 2 + 4 H + + 4 e 2 H 2 O +1.229
Pb 2+ + 2e Pb −0.1262
PbO 2 + SO 4 2− + 4 H + + 2 e PbSO 4 + 2 H 2 O +1.69
PbS + 2e Pb + S 2− −0.95
PbSO 4 + 2e Pb + SO 4 2− −0.3505
Pd 2+ + 2e Pd +0.987
[ PdCl 4 ] 2− + 2e Pd + 4Cl +0.591
Pt 2+ + 2e Pt +1.20
[ PtBr 4 ] 2− + 2e Pt + 4Br +0.58
[ PtCl 4 ] 2− + 2e Pt + 4Cl +0.755
[ PtCl 6 ] 2− + 2e [ PtCl 4 ] 2− + 2Cl +0.68
Pu 3 + 3e Pu −2.03
Ra 2+ + 2e Ra −2.92
Rb + + e Rb −2.98
[ RhCl 6 ] 3− + 3e Rh + 6Cl +0.44
S + 2e S 2− −0.47627
S + 2 H + + 2 e H 2 S +0.142
Sc 3+ + 3e Sc −2.09
Se + 2 H + + 2 e H 2 Se −0.399
[ SiF 6 ] 2− + 4e Si + 6F −1.2
SiO 3 2− + 3H 2 O + 4e Si + 6OH −1.697
SiO 2 + 4 H + + 4 e Si + 2 H 2 O −0.86
Sm 3+ + 3e Sm −2.304
Sn 4+ + 2e Sn 2+ +0.151
Sn 2+ + 2e Sn −0.1375
[ SnF 6 ] 2− + 4e Sn + 6F −0.25
SnS + 2e Sn + S 2− −0.94
Sr 2+ + 2e Sr −2.89
TeO 2 + 4 H + + 4 e Te + 2 H 2 O +0.593
Th 4+ + 4e Th −1.90
Ti 2+ + 2e Ti −1.630
U 3+ + 3e U −1.79
V 2+ + 2e V −1.19
Y 3+ + 3e Y −2.37
Zn 2+ + 2e Zn −0.7618
[ Zn ( CN ) 4 ] 2− + 2e Zn + 4CN −1.26
[ Zn ( NH 3 ) 4 ] 2+ + 2e Zn + 4NH 3 −1.04
Zn ( OH ) 2 + 2e Zn + 2OH −1.245
[ Zn ( OH ) 4 ] 2 + 2e Zn + 4OH −1.199
ZnS + 2e Zn + S 2− −1.40
Zr 4 + 4e Zr −1.539

Questions & Answers

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Odigie Reply
evolutionary history and relationship of an organism or group of organisms
AI-Robot
ok
Deng
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Hajah Reply
the study of living organisms and their interactions with one another and their environments
AI-Robot
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Victoria Reply
HOW CAN MAN ORGAN FUNCTION
Alfred Reply
the diagram of the digestive system
Assiatu Reply
allimentary cannel
Ogenrwot
How does twins formed
William Reply
They formed in two ways first when one sperm and one egg are splited by mitosis or two sperm and two eggs join together
Oluwatobi
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Josephine Reply
Genetics is the study of heredity
Misack
how does twins formed?
Misack
What is manual
Hassan Reply
discuss biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles
Joseph Reply
what is biology
Yousuf Reply
the study of living organisms and their interactions with one another and their environment.
Wine
discuss the biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles in an essay form
Joseph Reply
what is the blood cells
Shaker Reply
list any five characteristics of the blood cells
Shaker
lack electricity and its more savely than electronic microscope because its naturally by using of light
Abdullahi Reply
advantage of electronic microscope is easily and clearly while disadvantage is dangerous because its electronic. advantage of light microscope is savely and naturally by sun while disadvantage is not easily,means its not sharp and not clear
Abdullahi
cell theory state that every organisms composed of one or more cell,cell is the basic unit of life
Abdullahi
is like gone fail us
DENG
cells is the basic structure and functions of all living things
Ramadan
What is classification
ISCONT Reply
is organisms that are similar into groups called tara
Yamosa
in what situation (s) would be the use of a scanning electron microscope be ideal and why?
Kenna Reply
A scanning electron microscope (SEM) is ideal for situations requiring high-resolution imaging of surfaces. It is commonly used in materials science, biology, and geology to examine the topography and composition of samples at a nanoscale level. SEM is particularly useful for studying fine details,
Hilary
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Source:  OpenStax, Chemistry. OpenStax CNX. May 20, 2015 Download for free at http://legacy.cnx.org/content/col11760/1.9
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