Question

What is buffer solution what are its type explain suitable example

Answer 1

A buffer solution is an aqueous solution consisting of a mixture of a weak acid and its conjugate base, or vice versa. Its pH changes very little when a small amount of strong acid or base is added to it.
In nature, there are many systems that use buffering for pH regulation. For example, the bicarbonate buffering system is used to regulate the pH of blood.

Answer 2

$\textbf{\large{Answer -}}$

$\textbf{Buffer Solution :}$

The solution which resist any change in it's pH value by adding small amount of acid or bases are known as buffer solution.

$\textbf{Types of buffer solution :}$

1. Solution of single substance
2. Solution of mixture substance

$\textbf{Solution of single substance :}$

Solution of salt of weak acid and weak base will act as a buffer solution.

Example : $CH_{3}COONH_{4}, (NH_{4})_{2}CO_{3}, (NH_{4})_{2}S$

$\textbf{Solution of mixture substance :}$

It is of two types i.e., acidic buffer solution and basic buffer solution.

• $\textbf{Acidic buffer solution :}$

It is a solution of weak acid and the salt of this weak acid with strong base.

Example -

1. $CH_{3}COOH + CH_{3}COONa$
2. $HCN + NaOH$
3. $H_{2}S + K_{2}S$
4. $H_{2}CO_{3} + Na_{2}CO_{3}$

• $\textbf{Basic buffer solution :}$

It is a solution of weak base and the salt of this weak base with strong acid.

Example -

1. $NH_{4}OH + NH_{4}Cl$
2. $Mg(OH)_{2} + MgSO_{4}$