It will react with water molecules to form ${[B{(OH)_4}]^ - }$ and will give one proton. So, in this way, it will act as an acid. -Here, we can see that one molecule of boric acid gives one proton. So, this acid can be considered as a monoprotic acid.

Why boric acid is mono basic?

- Although Boric acid contains 3 OH groups yet it can act as monobasic acid rather than tribasic acid. This is because it does not act as a proton donor rather it accepts a pair of electrons from OH- ions. ... - Since, only one \[{{H}^{+}}\]can be released by a water molecule, boric acid is a monobasic acid.

Why are some acids monoprotic?

Anne Marie Helmenstine, Ph. D. A monoprotic acid donates only one proton or hydrogen atom per molecule to an aqueous solution. ... Any acid that contains just one hydrogen atom in its formula is monoprotic, but some acids that contain more than one hydrogen atom are also monoprotic.