The lone pair of electrons on sulfur in the sulfite ion (SO₃²⁻) is in

Name: The lone pair of electrons on sulfur in the sulfite ion (SO 3 2 − ) is in
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The lone pair of electrons on sulfur in the sulfite ion is in an $sp^2$ hybrid orbital. This is because sulfur in sulfite forms three sigma bonds with oxygen atoms and has one lone pair, leading to $sp^2$ hybridization to accommodate the three bonding pairs and one lone pair in a trigonal planar arrangement.

The Lone Pair of Electrons on Sulfur in the Sulfite