Chapter 19.docx

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Department
Chemistry & Biochemistry
Course
CHM 142
Professor
Dr.James D.Garrity
Semester
Summer

Description
Electrochemistry—transformation between chemical and electrical energy Electrochemical cell—apparatus that converts chemical energy into electrical work or vice versa  Reduction and oxidation half reactions are in separate compartments linked by an external circuit  Cell diagram—symbols that show how the components of an electrochemical cell are connected  Electrons flow from anode (-) (oxidation) to cathode (+)(reduction) via external circuit  A salt bridge connects the two compartments Standard reduction potential (E red°)—potential of a reduction half-reaction in which all reactants and products are in standard states  Unit: volts  Reference: S
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