Question

calculate the oxidation number of p in H3 PO 4​

Answer 1

H3PO4 = 3(1) + x + 4(-2)= 0 where x= o.n of p
3 + x - 8 = 0
x = 5
Thus oxidation number of P in H3PO4 is 5

Answer 2

3 x 1x p x 4(-2)=0

3 x p x-8=0

p-5= 0

p =+5