Titration is a method of volumetric analysis-the use of volume measurements to analyze the concentration of an unknown. The most common types of titrations are acid-base titrations, but a similar principle applies in an oxidation- reduction (redox) titration. In this simulation of a redox titration, the MnO (permanganate) ion is reduced to Mn"ion, and the Fe"* ion is oxidized to Fe * ion. This redox reaction takes place in acidic solution. Side note on vocabulary not tested on AP: We say that the permanganate ion is the oxidizing agent (because it oxidizes the Fe"), and the iron(II) ion is the reducing agent (because it reduces the MnO, ). Balance each half-reaction, and then write the fully balanced redox reaction in acidic solution. Oxidation half-reaction: Reduction half-reaction:

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