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11 September, 12:17

What is the oxidation number of iodine in KIO4? (1) + 1 (3) + 7 (2) - 1 (4) - 7

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  1. 11 September, 15:11
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    KIO4 is an example of polyatomic ion.

    The sum of the oxidation numbers in a polyatomic ion is equal to the charge on the ion.

    The charge on this polyatomic ion is 0.

    To get the oxidation number of I, we will let x as the oxidation number of I.

    We can get the oxidation number of Iodine by solving like this;

    KIO4 : (+1) + x + 4 (-2) = 0

    (+1) + x - 8 = 0

    x - 7 = 0

    x = + 7

    Therefore, the oxidation number of iodine atom in KIO4 is + 7.
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