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http://answers.yahoo.com/question/index?qid=20080225134952AAqOzY7 First break the equation into two parts - the oxidation reaction and the reduction reaction. Start with the Mn2+ Mn2+ --> MnO4- It has to get the O from somewhere - this comes from water so Mn2+ + H2O --> MnO4- + H+

Oxidation reduction question