What are the oxidation numbers of #SO_2#, #SO_3#, #P_2O_3#, and #P_2O_5#? What is the oxidation number of hydrogen peroxide?

1 Answer
Sep 13, 2017

Answer:

Well, we can assign oxidation numbers........

Explanation:

And for oxides, the oxygen state of the oxygen is necessarily #-II#.. And we assign the oxidation state of the heteroatom on this basis....

#SO_2#, we gots #S(+IV)#;

#SO_3#, we gots #S(+VI)#;

#P_2O_3#, we gots #P(+III)#;

And for #P_2O_5#, we gots #P(+V)#......

Sometimes we consider a #"peroxide"#, i.e. a #O-O# linkage; here the electrons in the (weak) #O-O# bond are assigned to each element (because the oxygens HAVE EQUAL electronegativity) to give say the hydroperoxyl radical:

#H_2O_2rarr2xxdotOH#

When we do this for #OF_2#...we get #2xxF^(-) + O(+II)#

What are the individual oxidation states of the oxygen atoms in the ozone molecule, #O=stackrel(+)O-O^(-)#?