Potenciais Padrão de Redução

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EC | Rev. 0.5 
Potenciais padrões a 25°C. 
Meia-reação de redução E°/V Meia-reação de redução E°/V 
F2(g) + 2e– ⇄ 2F–(aq) +2,890 MnO2(s) + H2O(l) + e− ⇄ MnOOH(s) + OH−(aq) +0,15 
O3(g) + 2H+(aq) + 2e– ⇄ O2(g) + H2O(l) +2,075 Sn4+(aq) + 2e– ⇄ Sn2+(aq) +0,15 
Co3+(aq) + e– ⇄ Co2+(aq) +1,92 HgO(s) + H2O(l) + 2e− ⇄ Hg(l) + 2OH−(aq) +0,098 
Au+(aq) + e– ⇄ Au(s) +1,83 AgBr(s) + e– ⇄ Ag(s) + Br–(aq) +0,0713 
H2O2(aq) + 2H+(aq) + 2e– ⇄ 2H2O(l) +1,763 2H+(aq) + 2e– ⇄ H2(g) 0 
Ce4+(aq) + e– ⇄ Ce3+(aq) +1,72 Fe3+(aq) + 3e– ⇄ Fe(s) –0,036 
Pb4+(aq) + 2e– ⇄ Pb2+(aq) +1,69 O2(g) + H2O(l) + 2e– ⇄ HO2
–(aq) + OH–(aq) –0,098 
PbO2(s) + SO4
2–(aq) + 4H+(aq) + 2e– ⇄ PbSO4(s) + 
2H2O(l) 
+1,685 Pb2+(aq) + 2e– ⇄ Pb(s) –0,126 
2NO(g) + 4H+(aq) + 4e− ⇄ N2(g) + 2H2O(l) +1,678 In+(aq) + e– ⇄ In(s) –0,126 
2HClO(aq) + 2H+(aq) + 2e– ⇄ Cl2(g) + 2H2O(l) +1,630 Sn2+(aq) + 2e– ⇄ Sn(s) –0,141 
2HBrO(aq) + 2H+(aq) + 2e– ⇄ Br2(l) + 2H2O(l) +1,604 NO3
−(aq) + H2O(l) + e− ⇄ NO(g) + 2OH−(aq) −0,149 
Mn3+(aq) + e– ⇄ Mn2+(aq) +1,56 AgI(s) + e– ⇄ Ag(s) + I–(aq) –0,1519 
Au3+(aq) + 3e– ⇄ Au(s) +1,52 Ni2+(aq) + 2e– ⇄ Ni(s) –0,236 
MnO4
–(aq) + 8H+(aq) + 5e– ⇄ Mn2+(aq) + 4H2O(l) +1,507 
MnOOH(s) + H2O(l) + e− ⇄ Mn(OH)2(s) + 
OH−(aq) 
−0,24 
PbO2(s) + 4H+(aq) + 2e– ⇄ Pb2+(aq) + 2H2O(l) +1,458 CH3OH(aq) + H2O(l) + 2e− ⇄ CH4(g) + 2OH−(aq) −0,245 
Cl2(g) + 2e– ⇄ 2Cl–(aq) +1,3604 V3+(aq) + e– ⇄ V2+(aq) –0,255 
Au3+(aq) + 2e– ⇄ Au+(aq) +1,36 Co2+(aq) + 2e– ⇄ Co(s) –0,282 
Cr2O7
2–(aq) + 14H+(aq) + 6e– ⇄ 2Cr3+(aq) + 7H2O(l) +1,36 Tl+(aq) + e– ⇄ Tl(s) –0,336 
O3(g) + H2O(l) + 2e– ⇄ O2(g) + 2OH–(aq) +1,247 In3+(aq) + 3e– ⇄ In(s) –0,338 
Tl3+(aq) + 2e– ⇄ Tl+(aq) +1,280 PbSO4(s) + 2e– ⇄ Pb(s) + SO4
2–(aq) –0,3586 
MnO2(s) + 4H+(aq) + 2e– ⇄ Mn2+(aq) + H2O(l) +1,230 Cd2+(aq) + 2e– ⇄ Cd(s) –0,402 
O2(g) + 4H+(aq) + 4e– ⇄ 2H2O(l) +1,2291 Cr3+(aq) + e– ⇄ Cr2+(aq) –0,42 
ClO4
–(aq) + 2H+(aq) + 2e– ⇄ ClO3
–(aq) + H2O(l) +1,226 Fe2+(aq) + 2e– ⇄ Fe(s) –0,44 
Pt2+(aq) + 2e– ⇄ Pt(s) +1,18 In3+(aq) + 2e– ⇄ In+(aq) –0,444 
Br2(aq) + 2e– ⇄ 2Br–(aq) +1,098 Ga3+(aq) + 3e– ⇄ Ga(s) –0,549 
Br2(g) + 2e– ⇄ 2Br–(aq) +1,094 Se(s) + 2e− ⇄ Se2−(aq) −0,67 
Br2(l) + 2e– ⇄ 2Br–(aq) +1,078 Sb2O3(s) + 3H2O(l) + 6e– ⇄ 2Sb(s) + 6OH–(aq) −0,681 
MnO2(s) + H+(aq) + e– ⇄ MnOOH(s) +0,98 Ni(OH)2(s) + 2e− ⇄ Ni(s) + 2OH−(aq) −0,714 
NO3
–(aq) + 4H+(aq) + 3e– ⇄ NO(g) + 2H2O(l) +0,955 Cr3+(aq) + 3e– ⇄ Cr(s) –0,733 
Pd2+(aq) + 2e– ⇄ Pd(s) +0,915 N2(g) + 6H2O(l) + 6e− ⇄ 2NH3(aq) + 6OH−(aq) −0,736 
2Hg2+(aq) + 2e– ⇄ Hg2
2+(aq) +0,908 Zn2+(aq) + 2e– ⇄ Zn(s) –0,762 
ClO–(aq) + H2O(l) + 2e– ⇄ Cl–(aq) + 2OH–(aq) +0,890 Cd(OH)2(s) + 2e− ⇄ Cd(s) + 2OH−(aq) −0,826 
Hg2+(aq) + 2e– ⇄ Hg(l) +0,852 2H2O(l) + 2e– ⇄ H2(g) + 2OH–(aq) –0,8280 
2NO(g) + 2H2O(l) + 4e− ⇄ N2(g) + 4OH−(aq) +0,850 Cr2+(aq) + 2e– ⇄ Cr(s) –0,89 
Ag+(aq) + e– ⇄ Ag(s) +0,7993 V2+(aq) + 2e– ⇄ V(s) –1,125 
Hg2
2+(aq) + 2e– ⇄ 2Hg(l) +0,796 Mn2+(aq) + 2e– ⇄ Mn(s) –1,182 
NO3
–(aq) + 2H+(aq) + e– ⇄ NO2(aq) + H2O(l) +0,773 Zn(OH)2(s) + 2e− ⇄ Zn(s) + 2OH−(aq) −1,249 
Fe3+(aq) + e– ⇄ Fe2+(aq) +0,771 ZnO(s) + H2O(l) + 2e− ⇄ Zn(s) + 2OH−(aq) −1,260 
Tl3+(aq) + 3e– ⇄ Tl(s) +0,741 Ti3+(aq) + 3e– ⇄ Ti(s) –1,37 
BrO–(aq) + H2O(l) + 2e– ⇄ Br–(aq) + 2OH–(aq) +0,766 Zr4+(aq) + 4e– ⇄ Zr(s) –1,45 
Hg2SO4(s) + 2e– ⇄ 2Hg(l) + SO4
2–(aq) +0,6158 Al 3+(aq) + 3e– ⇄ Al(s) –1,677 
MnO4
2–(aq) + 2H2O(l) + 2e– ⇄ MnO2(s) + 4OH–(aq) +0,60 Be2+(aq) + 2e– ⇄ Be(s) –1,968 
MnO4
–(aq) + e– ⇄ MnO4
2–(aq) +0,56 Sc3+(aq) + 3e– ⇄ Sc(s) –2,09 
CH3OH(aq) + 2H+(aq) + 2e− ⇄ CH4(g) + H2O(l) +0,583 2Li+(aq) + H2(g) + 2e− ⇄ 2LiH(s) −2,331 
I2(s) + 2e– ⇄ 2I–(aq) +0,535 Al 2O3(s) + 3H2O(l) + 6e− ⇄ 2Al(s) + 6OH−(aq) −2,332 
NiOOH(s) + H2O(l) + e– ⇄ Ni(OH)2(s) + OH–(aq) +0,52 Al(OH)3(s) + 3e− ⇄ Al(s) + 3OH−(aq) −2,338 
Cu+(aq) + e– ⇄ Cu(s) +0,518 Mg2+(aq) + 2e– ⇄ Mg(s) –2,360 
ReO4
–(aq) + 4H+(aq) + 3e– ⇄ ReO2(s) + 2H2O(l) +0,510 2Na+(aq) + H2(g) + 2e− ⇄ 2NaH(s) −2,367 
Ag2CrO4(s) + 2e– ⇄ 2Ag(s) + CrO4
2–(aq) +0,4470 La3+(aq) + 3e– ⇄ La(s) –2,379 
O2(g) + 2H2O(l) + 4e– ⇄ 4OH–(aq) +0,4011 Y3+(aq) + 3e– ⇄ Y(s) –2,38 
ClO4
–(aq) + H2O(l) + 2e– ⇄ ClO3
–(aq) + 2OH–(aq) +0,398 Be(OH)4
2–(aq) + 2e– ⇄ Be(s) + 4OH–(aq) –2,517 
[Fe(CN)6]
3–(aq) + e– ⇄ [Fe(CN)6]
4–(aq) +0,361 MgO(s) + H2O(l) + 2e− ⇄ Mg(s) + 2OH−(aq) −2,550 
Cu2+(aq) + 2e– ⇄ Cu(s) +0,339 Na+(aq) + e– ⇄ Na(s) –2,7143 
Cr2O7
2−(aq) + 14H+(aq) + 12e− ⇄ 2Cr(s) + 7H2O(l) +0,310 Ca2+(aq) + 2e– ⇄ Ca(s) –2,868 
Bi3+(aq) + 3e– ⇄ Bi(s) +0,308 Sr2+(aq) + 2e– ⇄ Sr(s) –2,899 
Hg2Cl2(s) + 2e– ⇄ 2Hg(l) + 2Cl–(aq) +0,2682 Ba2+(aq) + 2e– ⇄ Ba(s) –2,906 
AgCl(s) + e– ⇄ Ag(s) + Cl–(aq) +0,2224 K+(aq) + e– ⇄ K(s) –2,936 
CO2(g) + 8H+(aq) + 8e− ⇄ CH4(g) + 2H2O(l) +0,1694 Rb+(aq) + e– ⇄ Rb(s) –2,943 
Cu2+(aq) + e– ⇄ Cu+(aq) +0,161 Li +(aq) + e– ⇄ Li(s) –3,040 
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