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Química 2ed

L Potenciales de electrodos estándar (media celda)

Química 2edL Potenciales de electrodos estándar (media celda)
Potenciales de electrodos estándar (media celda)
Semirreacción E° (V)
Ag++e–⟶AgAg++e–⟶Ag +0,7996
AgCl+e–⟶Ag+Cl–AgCl+e–⟶Ag+Cl– +0,22233
[Ag(CN)2 ]–+e–⟶Ag+2CN–[Ag(CN)2 ]–+e–⟶Ag+2CN– -0,31
Ag2CrO4+2 e–⟶2Ag+CrO42−Ag2CrO4+2 e–⟶2Ag+CrO42− +0,45
[Ag(NH3)2 ]++e–⟶Ag+2NH3[Ag(NH3)2 ]++e–⟶Ag+2NH3 +0,373
[Ag(S2O3)2 ]3++e–⟶Ag+2S2O32−[Ag(S2O3)2 ]3++e–⟶Ag+2S2O32− +0,017
[AlF6]3−+3e–⟶Al+6F–[AlF6]3−+3e–⟶Al+6F– -2,07
Al3++3e–⟶AlAl3++3e–⟶Al -1,662
Am3++3e–⟶AmAm3++3e–⟶Am -2,048
Au3++3e–⟶AuAu3++3e–⟶Au +1,498
Au++e–⟶AuAu++e–⟶Au +1,692
Ba2++2 e–⟶BaBa2++2 e–⟶Ba -2,912
Be2++2 e–⟶BeBe2++2 e–⟶Be -1,847
Br2(aq)+2 e–⟶2Br–Br2(aq)+2 e–⟶2Br– +1,0873
Ca2++2 e–⟶CaCa2++2 e–⟶Ca -2,868
Ce3+3e–⟶CeCe3+3e–⟶Ce -2,483
Ce4++e–⟶Ce3+Ce4++e–⟶Ce3+ +1,61
Cd2++2 e–⟶CdCd2++2 e–⟶Cd -0,4030
[Cd(CN)4]2−+2 e–⟶Cd+4CN–[Cd(CN)4]2−+2 e–⟶Cd+4CN– -1,09
[Cd(NH3)4]2++2 e–⟶Cd+4NH3[Cd(NH3)4]2++2 e–⟶Cd+4NH3 -0,61
CdS+2 e–⟶Cd+S2−CdS+2 e–⟶Cd+S2− -1,17
Cl2+2 e–⟶2Cl–Cl2+2 e–⟶2Cl– +1,35827
ClO4–+H2O+2 e–⟶ClO3–+2OH–ClO4–+H2O+2 e–⟶ClO3–+2OH– +0,36
ClO3–+H2O+2 e–⟶ClO2–+2OH–ClO3–+H2O+2 e–⟶ClO2–+2OH– +0,33
ClO2–+H2O+2 e–⟶ClO–+2OH–ClO2–+H2O+2 e–⟶ClO–+2OH– +0,66
ClO–+H2O+2 e–⟶Cl–+2OH–ClO–+H2O+2 e–⟶Cl–+2OH– +0,89
ClO4–+2H3O++2 e–⟶ClO3–+3H2OClO4–+2H3O++2 e–⟶ClO3–+3H2O +1,189
ClO3–+3H3O++2 e–⟶HClO2+4H2OClO3–+3H3O++2 e–⟶HClO2+4H2O +1,21
HClO+H3O++2 e–⟶Cl–+2H2OHClO+H3O++2 e–⟶Cl–+2H2O +1,482
HClO+H3O++e–⟶12Cl2+2H2OHClO+H3O++e–⟶12Cl2+2H2O +1,611
HClO2+2H3O++2 e–⟶HClO+3H2OHClO2+2H3O++2 e–⟶HClO+3H2O +1,628
Co3++e–⟶Co2+(2mol//H2SO4)Co3++e–⟶Co2+(2mol//H2SO4) +1,83
Co2++2 e–⟶CoCo2++2 e–⟶Co -0,28
[Co(NH3)6]3++e–⟶[Co(NH3)6]2+[Co(NH3)6]3++e–⟶[Co(NH3)6]2+ +0,1
Co(OH)3+e–⟶Co(OH)2 +OH–Co(OH)3+e–⟶Co(OH)2 +OH– +0,17
Cr3+3e–⟶CrCr3+3e–⟶Cr -0,744
Cr3++e–⟶Cr2+Cr3++e–⟶Cr2+ -0,407
Cr2++2 e–⟶CrCr2++2 e–⟶Cr -0,913
[Cu(CN)2 ]–+e–⟶Cu+2CN–[Cu(CN)2 ]–+e–⟶Cu+2CN– -0,43
CrO42−+4H2O+3e–⟶Cr(OH)3+5OH–CrO42−+4H2O+3e–⟶Cr(OH)3+5OH– -0,13
Cr2O72−+14H3O++6e–⟶2Cr3++21H2OCr2O72−+14H3O++6e–⟶2Cr3++21H2O +1,232
[Cr(OH)4]–+3e–⟶Cr+4OH–[Cr(OH)4]–+3e–⟶Cr+4OH– -1,2
Cr(OH)3+3e–⟶Cr+3OH–Cr(OH)3+3e–⟶Cr+3OH– -1,48
Cu2++e–⟶Cu+Cu2++e–⟶Cu+ +0,153
Cu2++2 e–⟶CuCu2++2 e–⟶Cu +0,34
Cu++e–⟶CuCu++e–⟶Cu +0,521
F2 +2 e–⟶2F–F2 +2 e–⟶2F– +2,866
Fe2++2 e–⟶FeFe2++2 e–⟶Fe -0,447
Fe3++e–⟶Fe2+Fe3++e–⟶Fe2+ +0,771
[Fe(CN)6]3−+e–⟶[Fe(CN)6]4−[Fe(CN)6]3−+e–⟶[Fe(CN)6]4− +0,36
Fe(OH)2 +2 e–⟶Fe+2OH–Fe(OH)2 +2 e–⟶Fe+2OH– -0,88
FeS+2 e–⟶Fe+S2−FeS+2 e–⟶Fe+S2− -1,01
Ga3++3e–⟶GaGa3++3e–⟶Ga -0,549
Gd3++3e–⟶GdGd3++3e–⟶Gd -2,279
12H2+e–⟶H–12H2+e–⟶H– -2,23
2H2O+2 e–⟶H2+2OH–2H2O+2 e–⟶H2+2OH– -0,8277
H2O2+2H3O++2 e–⟶4H2OH2O2+2H3O++2 e–⟶4H2O +1,776
2H3O++2 e–⟶H2+2H2O2H3O++2 e–⟶H2+2H2O 0,00
HO2–+H2O+2 e–⟶3OH–HO2–+H2O+2 e–⟶3OH– +0,878
Hf4++4e–⟶HfHf4++4e–⟶Hf -1,55
Hg2++2 e–⟶HgHg2++2 e–⟶Hg +0,851
2Hg2++2 e–⟶Hg22+2Hg2++2 e–⟶Hg22+ +0,92
Hg22++2 e–⟶2HgHg22++2 e–⟶2Hg +0,7973
[HgBr4]2−+2 e–⟶Hg+4Br–[HgBr4]2−+2 e–⟶Hg+4Br– +0,21
Hg2Cl2+2 e–⟶2Hg+2Cl–Hg2Cl2+2 e–⟶2Hg+2Cl– +0,26808
[Hg(CN)4]2−+2e–⟶Hg+4CN–[Hg(CN)4]2−+2e–⟶Hg+4CN– -0,37
[HgI4]2−+2e–⟶Hg+4I–[HgI4]2−+2e–⟶Hg+4I– -0,04
HgS+2e–⟶Hg+S2−HgS+2e–⟶Hg+S2− -0,70
I2+2e–⟶2I–I2+2e–⟶2I– +0,5355
In3++3e–⟶InIn3++3e–⟶In -0,3382
K++e–⟶KK++e–⟶K -2,931
La3++3e–⟶LaLa3++3e–⟶La -2,52
Li++e–⟶LiLi++e–⟶Li -3,04
Lu3++3e–⟶LuLu3++3e–⟶Lu -2,28
Mg2++2e–⟶MgMg2++2e–⟶Mg -2,372
Mn2++2e–⟶MnMn2++2e–⟶Mn -1,185
MnO2+2H2O+2e–⟶Mn(OH)2 +2OH–MnO2+2H2O+2e–⟶Mn(OH)2 +2OH– -0,05
MnO4–+2H2O+3e–⟶MnO2+4OH–MnO4–+2H2O+3e–⟶MnO2+4OH– +0,558
MnO2+4H++2 e–⟶Mn2++2H2OMnO2+4H++2 e–⟶Mn2++2H2O +1,23
MnO4–+8H++5e–⟶Mn2++4H2OMnO4–+8H++5e–⟶Mn2++4H2O +1,507
Na++e–⟶NaNa++e–⟶Na -2,71
Nd3++3e–⟶NdNd3++3e–⟶Nd -2,323
Ni2++2e–⟶NiNi2++2e–⟶Ni -0,257
[Ni(NH3)6]2++2e–⟶Ni+6NH3[Ni(NH3)6]2++2e–⟶Ni+6NH3 -0,49
NiO2+4H++2 e–⟶Ni2++2H2ONiO2+4H++2 e–⟶Ni2++2H2O +1,593
NiO2+2H2O+2e–⟶Ni(OH)2 +2OH–NiO2+2H2O+2e–⟶Ni(OH)2 +2OH– +0,49
NiS+2e–⟶Ni+S2−NiS+2e–⟶Ni+S2− +0,76
NO3–+4H++3e–⟶NO+2H2ONO3–+4H++3e–⟶NO+2H2O +0,957
NO3–+3H++2 e–⟶HNO2+H2ONO3–+3H++2 e–⟶HNO2+H2O +0,92
NO3–+H2O+2e–⟶NO2–+2OH–NO3–+H2O+2e–⟶NO2–+2OH– +0,10
Np3++3e–⟶NpNp3++3e–⟶Np -1,856
O2+2H2O+4e–⟶4OH–O2+2H2O+4e–⟶4OH– +0,401
O2+2H++2 e–⟶H2O2 O2+2H++2 e–⟶H2O2 +0,695
O2+4H++4e–⟶2H2OO2+4H++4e–⟶2H2O +1,229
Pb2++2e–⟶PbPb2++2e–⟶Pb -0,1262
PbO2+SO42−+4H++2 e–⟶PbSO4+2H2OPbO2+SO42−+4H++2 e–⟶PbSO4+2H2O +1,69
PbS+2e–⟶Pb+S2−PbS+2e–⟶Pb+S2− -0,95
PbSO4+2e–⟶Pb+SO42−PbSO4+2e–⟶Pb+SO42− -0,3505
Pd2++2e–⟶PdPd2++2e–⟶Pd +0,987
[PdCl4]2−+2e–⟶Pd+4Cl–[PdCl4]2−+2e–⟶Pd+4Cl– +0,591
Pt2++2e–⟶PtPt2++2e–⟶Pt +1,20
[PtBr4]2−+2e–⟶Pt+4Br–[PtBr4]2−+2e–⟶Pt+4Br– +0,58
[PtCl4]2−+2e–⟶Pt+4Cl–[PtCl4]2−+2e–⟶Pt+4Cl– +0,755
[PtCl6]2−+2e–⟶[PtCl4]2−+2Cl–[PtCl6]2−+2e–⟶[PtCl4]2−+2Cl– +0,68
Pu3+3e–⟶PuPu3+3e–⟶Pu -2,03
Ra2++2e–⟶RaRa2++2e–⟶Ra -2,92
Rb++e–⟶RbRb++e–⟶Rb -2,98
[RhCl6]3−+3e–⟶Rh+6Cl–[RhCl6]3−+3e–⟶Rh+6Cl– +0,44
S+2e–⟶S2−S+2e–⟶S2− -0,47627
S+2H++2 e–⟶H2SS+2H++2 e–⟶H2S +0,142
Sc3++3e–⟶ScSc3++3e–⟶Sc -2,09
Se+2H++2 e–⟶H2SeSe+2H++2 e–⟶H2Se -0,399
[SiF6]2−+4e–⟶Si+6F–[SiF6]2−+4e–⟶Si+6F– -1,2
SiO32−+3H2O+4e–⟶Si+6OH–SiO32−+3H2O+4e–⟶Si+6OH– -1,697
SiO2+4H++4e–⟶Si+2H2OSiO2+4H++4e–⟶Si+2H2O -0,86
Sm3++3e–⟶SmSm3++3e–⟶Sm -2,304
Sn4++2e–⟶Sn2+Sn4++2e–⟶Sn2+ +0,151
Sn2++2e–⟶SnSn2++2e–⟶Sn -0,1375
[SnF6]2−+4e–⟶Sn+6F–[SnF6]2−+4e–⟶Sn+6F– -0,25
SnS+2e–⟶Sn+S2−SnS+2e–⟶Sn+S2− -0,94
Sr2++2e–⟶SrSr2++2e–⟶Sr -2,89
TeO2+4H++4e–⟶Te+2H2OTeO2+4H++4e–⟶Te+2H2O +0,593
Th4++4e–⟶ThTh4++4e–⟶Th -1,90
Ti2++2e–⟶TiTi2++2e–⟶Ti -1,630
U3++3e–⟶UU3++3e–⟶U -1,79
V2++2e–⟶VV2++2e–⟶V -1,19
Y3++3e–⟶YY3++3e–⟶Y -2,37
Zn2++2e–⟶ZnZn2++2e–⟶Zn -0,7618
[Zn(CN)4]2−+2e–⟶Zn+4CN–[Zn(CN)4]2−+2e–⟶Zn+4CN– -1,26
[Zn(NH3)4]2++2e–⟶Zn+4NH3[Zn(NH3)4]2++2e–⟶Zn+4NH3 -1,04
Zn(OH)2 +2e–⟶Zn+2OH–Zn(OH)2 +2e–⟶Zn+2OH– -1,245
[Zn(OH)4]2 +2e–⟶Zn+4OH–[Zn(OH)4]2 +2e–⟶Zn+4OH– -1,199
ZnS+2e–⟶Zn+S2−ZnS+2e–⟶Zn+S2− -1,40
Zr4+4e–⟶ZrZr4+4e–⟶Zr -1,539
Tabla L1
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