Question

Define the term 'basicity' of an acid. Give the basicity of: nitric acid, sulphuric acid, phosphoric acid?

Answer 1

Basicity: The basicity of an acid is defined as the number of hydronium ions $\left({\text{H}}_3{\text{O}}^{+}\right)$ that can be produced by the ionization of one molecule of that acid in an aqueous solution.
Basicity may be different for different acids depending upon the number of hydrogen atoms present in the acid.
The basicity of the gives acids are as follows,

Acid	Basicity
Nitric Acid	1
Sulphuric Acid	2
Phosphoric Acid	3