Defination :
Types of buffer:-
It is of 2 type .
1.Acidic buffer
2.Basic buffer
Acidic buffer:
Defination :It is a type of buffer whose Ph is less then 7.
Composition :It is type of buffer which is formed by mixing week acid and its salt with strong base.
Example: Its example is acetic acid sodium acetate buffer.
Basic buffer:
Defination : It is a type of buffer whose Ph is less then 7.
Composition :It is a type of buffer which is formed by mixing week base and its salt with strong acid.
Example :Its example is ammonium hydroxide , ammonium chloride buffer NH4OH &NH4Cl .
Buffer action:
Buffer action mean how do buffer work .
Addition of acid .
When small amount of strong acid like HCl is added . It ionize to form hydrogen ion and chloride ion .This Hydrogen ion react with acetate ion and forms acetic acid.
HCl → H+ + Cl-
CH3COO- + H+→ CH3COOH
Since H+ ions are consumed Hence Ph does not change .
Addition of base
When strong base like NaOH is added to buffer solution.It ionize as
NaOH→ Na+ + OH-
Since OH- ions are consumed by H+ of Acetic acid .Hence Ph does not change
CH3COOH→ CH3COO- + H+
OH- + H+ → H2O
Applications of buffer:-
Industrial application:-
Buffer solution is used in industries like leather and dyes industries.
Analytical application:-
It is used in electroplating and analytical procedure
Calibration of ph meter:-
It is used to check either ph meter is giving correct reading or not.
Biological application:-
Ph of culture medium is maintained by using buffer solution.Change in ph may harm microorganism.
This vedio will be helpfull in understanding the most important topic buffer solution.
So listen this lecture attentively.
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