Potensial Elektroda Standar

  • June 2020
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Potensial elektroda standar (E0) beberapa unsur dalam suasana asam (298,15K) Elektroda Setengah Reaksi E0 (volt) − + Li|Li Li+ + e Li − 3.045 + − K|K K+ + e K − 2.925 − 2+ Ca|Ca2+ Ca + 2e Ca − 2.866 − + Na|Na+ Na + e Na − 2.714 − Mg|Mg2+ 2+ Mg + 2e Mg − 2.37 Al|Al3+ − 3+ Al + 3e Al − 1.662 Zn|Zn2+ − 2+ Zn + 2e Zn − 0.763 Fe|Fe2+ − 2+ Fe + 2e Fe − 0.440 Pb|Pb2+ − 2+ + Pb + 2e Pb − 0.126 Pt|H2|H − + 2+ + 0.000 2H + 2e H 2 *Pt|Cu ,Cu − 2+ + 0.153 Cu2+ + e Cu Cu|Cu − + + 0.337 Cu|Cu Cu2+ + 2e Cu − 3+ 2+ + 0.52 Pt|Fe ,Fe Cu+ e Cu − + 0.771 Ag|Ag+ Fe3+ + e Fe2+ 2+ + 0.7991 − Hg|Hg Ag+ + e Ag 2+ 2+ + 0.789 − Pt|Hg ,Hg2 Hg2+ + 2e Hg + 0.92 − Pt|O2,H2O 2Hg2+ + 2e Hg22+ 2 73+ + 1.229 Pt|Cr O ,Cr − O22+ 4H+ + 4e 2 H2O 42+ + 1.33 Pt|MnO ,Mn − 2− + 3+ Cr 2Cr + 7H 2O7 + 14H 6e 2O + 2.87 Pt|F2|F − MnO4 + 8H+ + 5e Mn2+ + 4H2O − − F2 + 2e 2F * Tanda koma antara Cu2+ dan Cu menunjukkan bahwa ada dua ion yang berbeda dalam fasa yang sama.

baterai e-

e-

Anoda

katoda

CuSO4 (aq)

Cu (s)

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