. How are the acids classified according to number of hydrogen atoms?

1 Answer
Ujjwal
Feb 18, 2018

See the explanation

Explanation:

Acids are classified on the basis of basicity.

Basicity refers to the number of replaceable [H^+] ions in an acid which are attached with an highly electronegative element such as oxygen which can be replaced by a base.

Basicity is also called proticity.

On the basis of basicity , they are divided into following categories :-

1) Monobasic or Monoprotic
Example #-># Hydrochloric acid (#HCl#).
#HCl# has one replaceable #[H^+]# ion.

2) Dibasic or Diprotic
Example #-># Sulphuric acid (#H_2SO_4#).
#H_2SO_4# has two replaceable #[H^+]# ions.

3) Tribasic or triprotic
Example #-># Phosphoric acid (#H_3PO_4#).
#H_3PO_4# has three replaceable #[H^+]# ions.

The basicity or number of replaceable #[H^+]# ions for an acid can be seen by drawing the Lewis structure of that acid.

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