01:160:162 Lecture Notes - Lecture 32: Reduction Potential, Membrane Potential, Intensive And Extensive Properties

• School: Rutgers University
• Department: Chemistry
• Course: 01:160:162
• Professor: B.Langowski

Document Summary

E values as they are written indicate potential of half-reactions to go in direction of reduction. Higher e reaction likes to go towards reduction. Changing sign of e gives potential of half-reaction to go in opposite direction towards oxidation. Value of e would then represent electrode"s oxidation potential. Reaction with higher value of e = reduction reaction (cathode) Reaction with lower value of e = oxidation reaction (anode) All components are under standard conditions (1 atm and 1 m) Overall cell potential depends on difference between individual electrode potentials. Cell potential is an intensive property does not depend on amount of material in system. When determining cell potential, do not multiply the half cell e values, even if you need to multiply. Two different conceptual approaches to determining e cell: the half-reaction to balance the redox equation (1) difference in electrode potentials between cathode and anode. Oxidation potential of half-reaction determined by changing sign of e .