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J. W. Hill, R. H. Petrucci, T. W. McCreary, & S. S. Perry General Chemistry 4th edition

Review Question 18.1

What is the difference between an oxidation-reduction reaction and a half-reaction?






Answer:

Oxidation-reductions reactions always have an electron transfer from the oxidized species to the reduced species. When the oxidized species is separated from the reduced species, a balanced reaction can be written for each process (oxidation or reduction) that is called a half-reaction. All half-reactions must have electrons either as reactants (for reduction half-reactions) or products (for oxidation half-reactions).