Question
Is boric acid a protic acid? Explain.
✓
Answer
Boric acid is a Lewis acid; it is not a protonic acid.
Boric acid accepts electrons from hydroxyl ion of $\mathrm{H}_2 \mathrm{O}$ molecule.
$\mathrm{B}(\mathrm{OH})_3+2 \mathrm{HOH} \rightarrow\left[\mathrm{~B}(\mathrm{OH})_4\right]^{-}+\mathrm{H}_3 \mathrm{O}^{+}$
Boric acid accepts electrons from hydroxyl ion of $\mathrm{H}_2 \mathrm{O}$ molecule.
$\mathrm{B}(\mathrm{OH})_3+2 \mathrm{HOH} \rightarrow\left[\mathrm{~B}(\mathrm{OH})_4\right]^{-}+\mathrm{H}_3 \mathrm{O}^{+}$
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