# Importance of Buffer Solution

Buffer solutions find extensive applications in plant and animal physiology, in laboratory and in industry.

(a)    In living beings: The chemical changes of the processes in living being can only take place in a medium of definite pH1falue. Some pH values of biological interest are; blood 7.3 — 7.5, saliva 6.5 — 7.5, bile juice 7.1, gastric juice 1-3. If these are not kept constant, disorder takes place in the system.

The buffer system present in blood is $H_2CO_3, NaHCO_3$.

(b)   In laboratory: They are employed in studying the speed of chemical reactions, in the removal of phosphate ion and in preparing cultures for biological specimens.

(c)    In industry: They are used in the manufacture of ethyl alcohol from molasses (pH, 5-6.8), tanning of leather, paper manufacture, sugar manufacture, electroplating etc.

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