ng chemch21.2
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chemistryTRANSCRIPT
Electrochemistry
Electrochemistry
Chapter 21.2
Electric Potential
Measured in_________________
Results from a ___________________________________
If cell potential is ____, then the rxn is ___________________
Calculating Electric Potential:
1) Refer to the Reduction Potential chart for Half-Reactions (page ______)
2) Compare the 2 metals, determine which is ____________ on the chart
3) _______the 2 Half-Reaction values together
Example:
A voltaic cell is made using the following rxn
Fe+2 + 2 e- ( Fe
Eo = - 0.44 V
Ag+ + 1 e- ( Ag
Eo = + 0.80 V
Determine the cell reaction and calculate the cell potential
Example:
Determine the cell potential using Cu+2 and Hg+2
Cu ( Cu+2 + 2e-
Eo = - 0.34 V
Hg+2 + 2e- ( Hg
Eo = + 0.85 V