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19 January, 18:32

What is the oxidation number of manganese in the permanganate ion (mno4 - ) ?

a. 3

b. 2

c. 7

d. 2-

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Answers (1)
  1. 19 January, 18:53
    0
    Each oxygen will have the oxidation number (2-), and we know the total charge is 1-. We have four oxygen atoms per molecule, so we can set up the equation:

    (charge on Mn) + 4 (charge on O) = - 1

    (charge on Mn) + 4 (-2) = - 1

    (charge on Mn) - 8 = - 1

    Charge on Mn = 7

    The answer is C. 7
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