Calculate the oxidation number of phosphorus in the following species.(a) HPO_{3}^{2- }and (b) PO_{4}^{3- }
(a) Let the oxidation number of P inHPO_{3}^{2-} be x. So,+1 + x + (-6) = -2 x = +3(b) Let the oxidation number of P in PO^{3}_{4}– be x. So, x + (-8) = -3x = +5