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Balance the equation for a half-reaction that occurs in acidic solution. Use e− as the symbol for an electron.

MnO_{4}^{-} -> MnO_{2}

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The balanced half reaction equation is MnO4^- + 4H^+ ------>MnO2 + 2H2O + 3e

What is a redox reaction?

The term redox reaction has to do with a reaction in which there is a loss or  gain of electrons. In this reaction, one specie accepts electrons while another specie looses electrons.

The balanced half reaction equation in acid is; MnO4^- + 4H^+ ------>MnO2 + 2H2O + 3e

Learn more about redox reaction: https://brainly.com/question/12980705

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