Question

An acid with molecular formula ${{\text{C}}_{\text{7}}}{{\text{H}}_{\text{6}}}{{\text{O}}_{\text{3}}}$ forms three types of sodium salts, i.e.,${{\text{C}}_{\text{7}}}{{\text{H}}_{\text{5}}}{{\text{O}}_{\text{3}}}{\text{Na}}$, ${{\text{C}}_{\text{7}}}{{\text{H}}_4}{{\text{O}}_{\text{3}}}{\text{N}}{{\text{a}}_2}$ and ${{\text{C}}_{\text{7}}}{{\text{H}}_3}{{\text{O}}_{\text{3}}}{\text{N}}{{\text{a}}_3}$. The basicity of the acid is:
A) One
B) Two
C) Three
D) Four

Answer 1

There are different definitions of an acid. Acid is species that can donate the protons, acid is species that accepts an electron or any species which is electron deficient and acts as acid while the base is the species that can accept the proton, which can donate the electron or species which is electron-rich is known as base.

Complete step-by-step answer:
Here, the formula of the acid is given as ${{\text{C}}_{\text{7}}}{{\text{H}}_{\text{6}}}{{\text{O}}_{\text{3}}}$. Here, we can see that carbon, hydrogen, and oxygen are present; it indicates it is an organic acid.
The basicity of the acid is nothing but the number of replaceable hydrogen atoms present in the acid. Here, three salts of the acid are given those are ${{\text{C}}_{\text{7}}}{{\text{H}}_{\text{5}}}{{\text{O}}_{\text{3}}}{\text{Na}}$, ${{\text{C}}_{\text{7}}}{{\text{H}}_4}{{\text{O}}_{\text{3}}}{\text{N}}{{\text{a}}_2}$ and ${{\text{C}}_{\text{7}}}{{\text{H}}_3}{{\text{O}}_{\text{3}}}{\text{N}}{{\text{a}}_3}$. The first salt given is indicated; one hydrogen is replaced by a sodium ion. The second salt ${{\text{C}}_{\text{7}}}{{\text{H}}_4}{{\text{O}}_{\text{3}}}{\text{N}}{{\text{a}}_2}$ indicates two hydrogen atoms are replaced by sodium ions. Here, the third salt ${{\text{C}}_{\text{7}}}{{\text{H}}_3}{{\text{O}}_{\text{3}}}{\text{N}}{{\text{a}}_3}$ indicates three hydrogen atoms are replaced by sodium ions.
The maximum number of hydrogen atoms are replaced are three indicating the basicity of the given acid is three.

Therefore, option (C) three is the correct answer for the given question.

Note: Basicity of the acid is given as the number of hydrogen ions produced acid. One another definition of basicity is the number of replaceable hydrogen atoms present in the acid molecule. While acidity is the number of the replaceable hydroxide ions present in the base.