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15 September, 15:57

What is the oxidation state of phosphorus in the following compounds?

a. Phosphoric acid

b. Phosphorus pentoxide

c. phosphine

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Answers (1)
  1. 15 September, 17:46
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    A) H3PO4

    H (+1),

    P (X)

    O (-2)

    3 * (+1) + x+4 * (-2) = 0, 3+x-8=0, x=+5

    b) P2O5

    P (x)

    O (-2)

    2x-2*5=0, 2x=10, x=+5

    c) PH3

    P (x)

    H (+1)

    x+3 * (+1) = 0, x+3=0, x=-3
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