The nature of a solution whether neutral , acidic or basic depends upon its pH value. The pH of a solution changes when an acid or base added to it . Howerver the pH of the solution is maintained by the addition of a suitable buffer whether acidic or basic.
(i) Define a buffer solution
(ii) Give one example each of acidic and basic buffers.
(iii) What is the value associated with the use of buffer solution in human beings ?

Explanation

(i) A buffer solution is defined as a solution which resists a change in the pH value on the addition of a small amount of acid or base to it.
(ii) Example of acidic buffer : Acetic acid and sodium acetate.
Example of basic buffer : Ammonium hydroxide and ammonium chloride.
(iii) the pH of human blood renges between 7.36 to 7.42. In case there is a major change in its value severe problems may be created . Bicarbonate and carbonic acid present in the body act as buffer and they help in controlling the pH of the blood.