Question

why all the bond length of sulphur -oxygen in sulphate ion are equal ​

Answer 1

Answer:

SF4 has four bonded atoms and one lone pair. The five electron pairs around sulphur adopt trigonal bipyramidal geometry in which one position is occupied by a lone pair. ... The axial S-F bonds are bent slightly away from the lone pair. Hence, all the bonds in SF4 are not equivalent.

Answer 2

All the bond lengths of sulphur -oxygen in sulphate ions are equal due to their resonance.​

Explanation:

• Electronic configuration of S is 1s2, 2s2, 2p6, 3s2, 3p4 .

• The five electron pairs around sulphur adopt trigonal bipyramidal geometry in which one position is occupied by a lone pair.

• In SO2 molecules, the observed bond lengths in the two S-O bonds are exactly the same.

• The length is somewhere in between single and double bond length. It is because of resonance.

• Actually, it is the reason behind SO2 is having a bent structure.
• The molecule is having a resonance hybrid. Thus, both S−O bonds have equal length.
• The structure of the sulfur dioxide molecule will have partial negative charges on the oxygen atoms and a partial positive charge on the sulfur atoms.