[tex]O^{2-}[/tex] is the Lewis base in the following reaction:
[tex]SO_3(g) + O^{2-}(aq)[/tex] → [tex]SO_4^{2-}(aq)[/tex]
What is lewis base?
Lewis base is a species that donates an electron pair.
In the above-given chemical equation, the [tex]O^{2-}[/tex]is the lewis base which is donating an electron pair to the central atom of [tex]SO_3[/tex] to form [tex]SO_4^{-2}[/tex].
Hence, [tex]O^{2-}[/tex] is the Lewis base in the following reaction:
[tex]SO_3(g) + O^{2-}(aq)[/tex] → [tex]SO_4^{2-}(aq)[/tex]
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