Question

5. Draw the Lewis structures of the two resonance forms of ozone (Os). a. Assign formal charges to the atoms of one of the ozone structures. b.In the ozone molecule, do you observe one double and one single bond or are the two bonds equivalent?

Answer 1

b. In ozone molecule , while drawing Lewis electron dot structure of two resonance structures we observe that one bond is single while other bond is double . But in fact actual molecule is hybrid of these two resonance forms. so two bonds are equivalent which have partial double bond character . In fact experimentally it has been found that bond length of both the bonds is equal which is in between the length of a single bond and double bond . This shows that both bonds are equivalent.

(5). The lewis structures of the two resonance for Resonance hybrid. (a). Assignment of formal charge :- T Formal charge on an atom in a lewis structure Jotal no. of ralence I electrons in the I free atm 1- lone paid - Total no. of bonding I electrony yo Ist oxygen atom: - F.C = 6-6 - 12 (2) Clad oxygen antrom F.C = 6-4 - 13 (4) -0. And oxygen atom F.C = 6-2-1 (6) +1