Oxidation-Reduction Reactions and Electrochemistry
2018
This chapter explains the principles of oxidation and reduction, including the roles of the oxidizing and reducing agents and how to determine oxidation states. The construction and operation of a galvanic cell is overviewed and the function of the anode and cathode explained. The importance of balancing the half reactions first when balancing oxidation-reduction chemical equations is stressed. Also covered are the importance of standard cell potentials and the designation of the standard hydrogen electrode as the electrode by which all others are measured. Methods of determining the cell potentials both under standard and nonstandard conditions are given. A Case Study on the use of cathode protection in structural metals and the role of concentration cells in corrosion are discussed to stress the importance of oxidation-reduction principles to engineering. Other topics discussed are the application of oxidation-reduction chemistry in electrolysis and battery and fuel cell construction.
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