Question

Give an example of weak monobasic acid.

Answer 1

Chemical compounds are classified based on the different properties, one of the properties is the nature of the compounds. Based on the nature of compounds, classified into bases, acids and neutral compounds. Acid is a substance that can donate a proton easily.

Complete answer:
An acid is a chemical substance that can easily lose protons $\left( {{H^ + }} \right)$
The faster the loss of proton $\left( {{H^ + }} \right)$ , the stronger the acid.
Some of the examples were sulphuric acid, Nitric acid.
Weak acid cannot easily lose the proton $\left( {{H^ + }} \right)$ .
Some of the examples of weak acids are acetic acid and boric acid.
Monobasic acids are acids that can replace or lose only one hydrogen atom.
Some of the examples of monobasic acids are nitric acid, hydrochloric acid and periodic acid.
But weak mono acid is a weak acid which can lose only one proton $\left( {{H^ + }} \right)$ .
Boric acid has the chemical formula of ${H_3}B{O_3}$ .
It is a weak monobasic acid, it can accept one hydroxide ion from a water molecule, when water is added to boric acid.
The chemical reaction can be represented by:
$B{\left( {OH} \right)_3} + 2{H_2}O \to {\left[ {B{{\left( {OH} \right)}_4}} \right]^ - } + {H_3}{O^ + }$
An acid can also be defined as the compound that can accept hydroxide ions.
Thus, boric acid is a weak monobasic acid that can accept one hydroxide ion.

Note:
All the monobasic acids are not weak, some acids contain only one hydrogen atom that can be replaceable. An acid is a substance that can accept one hydroxide ion. Though boric acid does not contain any hydrogen atoms, it is a Lewis acid that can accept a pair of electrons.