Electrochemical Reactions

1
Electrochemical Reactions
DEEright-EleftEcu/Cu2-Ezn/Zn2
2
Electrochemical Reactions
Redox Reactions
3
Electrochemical Reactions
Redox Reactions
4
Electrochemical Reactions
Redox Reactions
for which A0
Electromotive force (EMF)
mkmk0RTlnak
SnimiDGrxnDG0RTlnp(niai)
5
Electrochemical Reactions
Redox Reactions
6
Electrochemical Reactions
Redox Reactions
E0-0.763 V n-2
E00.337 V n2
10-3 M Zn2 10-5 M Cu2
7
Electrochemical Reactions
Redox Reactions
Reduction
Oxidation
E00 V n-2 E01.23 V n-2
E00.337 V n2
8
Electrochemical Reactions
Redox Reactions
Balance metal
Acidic solution
Balance hydrogen with proton
Balance oxygen with water
Basic solution add 1 OH- to each side for each
H -- these make water, so recalculate water
Balance charge with electron
9
Electrochemical Reactions
Eh-pH Diagrams
10
Electrochemical Reactions
Eh-pH Diagrams