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August 18, 2010 11:38 9in x 6in b985-appC Elementary Physical Chemistry
Appendix C
Standard Reduction Potentials
Table C.1. The standard (reduction) half-reaction
◦
potentials at 25 C for a number of ions.
E /V
∗
Cd 2+ +2e − → Cd −0.40
Cu + +e − → Cu +0.52
Cu 2+ +2e − → Cu +0.34
Fe 2+ +2e − → −0.44
2H + +2e − → H 2 0
2H 2 O+2e − → H 2 +2OH − −0.83
Hg 2 Cl 2 +2e − → 2Hg + 2Cl − +0.27
O 2 +4H + +4e − → 2H 2O +1.23
O 2 +H 2O+2e − → HO 2 +OH − −0.08
PbSO 4 +2e − → Pb + SO 2− −0.36
4
Sn 2+ +2e − → Sn −0.14
Sn 4+ +2e − → Sn 2+ +0.15
Fe 2+ +2e − → Fe −0.44
Pb 2+ +2e − → Pb −0.36
I 2 +2e − → 2I − 0.54
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