Ch. 4 redox

This document defines and provides examples of oxidation and reduction reactions. It explains that oxidation involves a metal losing electrons while reduction involves a metal gaining electrons. However, these reactions must occur together in order to maintain electrical neutrality. An example redox reaction is provided where iron oxidizes and copper reduces. The document concludes by stating that determining whether a "free metal" is more active than a "combined metal" can predict if a redox reaction will occur.