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Question: Answered & Verified by Expert
Boric acid is an acid because its molecule
Chemistryp Block Elements (Group 13 & 14)
Options:
  • A
    contains replaceable $\mathrm{H}^{+}$ion
  • B
    gives up a proton
  • C
    accepts $\mathrm{OH}^{-}$from water releasing proton
  • D
    combines with proton from water molecule
Solution:
2137 Upvotes Verified Answer
The correct answer is:
accepts $\mathrm{OH}^{-}$from water releasing proton
Boric acid is a monobasic weak acid. It does not liberate $\mathrm{H}^{+}$ion but accepts electrons from $\mathrm{OH}^{-}$ion.
$$
\mathrm{H}_3 \mathrm{BO}_3+\mathrm{H}_2 \mathrm{O} \longrightarrow \mathrm{B}(\mathrm{OH})_4^{-}+\mathrm{H}^{+}
$$

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