Question

What is the difference in the structure of ${\mathrm{SO}}_3$ and ${\mathrm{SO}}_3^{2-}$?

Answer 1

Differences in the structure of ${\mathrm{SO}}_3$ and ${\mathrm{SO}}_3^{2-}$

Serial number	${\mathrm{SO}}_3$	${\mathrm{SO}}_3^{2-}$
1	The name of ${\mathrm{SO}}_3$ is Sulfur trioxide.	The name of ${\mathrm{SO}}_3^{2-}$ is sulfite ion.
2	In the structure of ${\mathrm{SO}}_3$, three double bonds are present and no lone pair of electrons are present on sulphur.	In the case of ${\mathrm{SO}}_3^{2-}$, one lone pair is present.
3	The geometry of sulphur trioxide is trigonal planar.	The geometry of ${\mathrm{SO}}_3^{2-}$ is the trigonal pyramidal.
4	Sulfur, the central atom has three bond pair. The hybridization of sulphur trioxide is $s{p}^2$. So, the geometry of sulphur trioxide is trigonal planar.	Sulfur, the central atom has one lone pair, and three bond pair. So, the hybridization is $s{p}^3$.So, the geometry of ${\mathrm{SO}}_3^{2-}$ is the trigonal pyramidal.
4