1.

Calculate the oxidation number of the underlined element in the following molecules. Na_(3)ul(P)O_(4)

Answer»

Solution :`Na_(3)PO_(4)` : SUPPOSE, the oxidation number of P in `Na_(3)PO_(4)` is X. The oxidation number of each NA atom is + 1 while that of each O atom is-2. Since `Na_(3)PO_(4)` is a neutral molecule, we have
`(+1)xx3+(x)+(-2)xx4=0`
or x=+5
Hence, the oxidation number of P in `Na_(3)PO_(4)` is + 5.


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