Write a balanced half-reaction for the oxidation of solid manganese dioxide to permanganate ion in basic aqueous solution. Be sure to add ph

Question

Write a balanced half-reaction for the oxidation of solid manganese dioxide to permanganate ion in basic aqueous solution. Be sure to add physical state symbols where appropriate.

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Lệ Thu 4 years 2021-07-24T13:10:51+00:00 1 Answers 319 views 0

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  1. giabao
    -1
    2021-07-24T13:12:04+00:00
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    Answer:

    8 OH⁻(aq) + Mn(s) ⇒ MnO₄⁻(aq) + 4 H₂O(l) + 7 e⁻

    Explanation:

    Let’s consider the following oxidation half-reaction that takes place in basic aqueous solution.

    Mn(s) ⇒ MnO₄⁻(aq)

    First, we will perform the mass balance. We will add 4 H₂O to the products side and 8 OH⁻ to the reactants side.

    8 OH⁻(aq) + Mn(s) ⇒ MnO₄⁻(aq) + 4 H₂O(l)

    Finally, we will perform the charge balance by adding 7 electrons to the products side.

    8 OH⁻(aq) + Mn(s) ⇒ MnO₄⁻(aq) + 4 H₂O(l) + 7 e⁻

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