Draw structure of boric acid showing hydrogen bonding. Which species is present in water? hybridizat

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p-Block Elements - I

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Draw the structure of boric acid showing hydrogen bonding. Which species is present in water? What is the hybridizations of boron in this species?

Option A

Option B

Option C

Option D

Solution

It has a layer structure in which planar $\mathrm{H}_{3} \mathrm{BO}_{3}$ units are joined by hydrogen bonds forming hexagonal rings. Boric acid is a weak monobasic acid. It is not a protonic acid but acts as a Lewis acid by accepting electrons from a hydroxyl ion. In water, boric acid is present in the form of $\left[\mathrm{B}(\mathrm{OH})_{4}\right]^{-}$species. The hybridizations of boron in this species is $s p^{3}$. $\mathrm{B}(\mathrm{OH})_{3}+2 \mathrm{HOH} \rightarrow\left[\mathrm{B}(\mathrm{OH})_{4}\right]^{-}+\mathrm{H}_{3} \mathrm{O}^{+}$

Standard 11

Chemistry

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