What is the equivalent weight of P in the following reaction ?P4 + NaOH →  NaH2 PO2 + PH3

What is the equivalent weight of P in the following reaction ?

P4 + NaOH   NaH2 PO2 + PH3

  1. A

    314

  2. B

    313

  3. C

    312

  4. D

    31 x 4/3

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    Solution:

    P4    NaH2 PO2 

    P40   4P+ + 4e-

       Eq. wt. Rductant = P44 P4PH3 P40 + 12e  4p3-    Eq. wt. Oxidant = P412    Eq. wt. P4 = P44 + P412 = P4 × 1648 = 4 × 313 = 31 × 43

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