An acidic buffer solution can be prepared by mixing solution of
An acidic buffer solution can be prepared by mixing solution of
Show Hint
Acidic buffers are a mixture of a weak acid and salt of its conjugate base with a strong base.
sodium acetate and acetic acid
- ammonium chloride and ammonium hydroxide
- sulphuric acid and sodium sulphate
- sodium chloride and sodium hydroxide
The Correct Option is A
Approach Solution - 1
An acidic buffer is prepared by mixing weak acid and its salt with a strong conjugate base i.e. CH3COOH and CH3COONa.
Therefore, acetic acid and sodium acetate can be used to prepare an acidic buffer.
Hence, option A) is the correct answer.
Approach Solution -2
Buffer solutions are of two types: Acidic buffer and Basic buffer.
- The Acidic buffer has a weak acid and its salt, along with a strong base.
- A Basic buffer has a weak base with its conjugate salt with a strong acid.
A buffer solution is used to maintain pH of a solution at a constant value during titration when a small amount of acid or base is added to the solution.
Approach Solution -3
Acidic buffers are a mixture of a weak acid and salt of its conjugate base with a strong base.
Option A - Solution of acetate and acetic acid - It has a mixture of a weak acid and the salt of the conjugate base with a strong base. Hence, it is an acidic buffer solution.
Option B - Solution of ammonium chloride and ammonium hydroxide - It is a basic buffer.
Option C - Solution of Sulphuric acid and sodium sulphate - It is not a buffer solution.
Option D - Solution of Sodium chloride and sodium hydroxide - It is not a buffer solution.
Hence, the only correct option is An acidic buffer solution can be prepared by mixing the solutions of Solution of acetate and acetic acid.
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Concepts Used:
Equilibrium
An equilibrium represents a state in a process when the observable properties such as color, temperature, pressure, concentration etc do not show any change.
The word equilibrium means ‘balance’ which indicates that a chemical reaction represents a balance between the reactants and products taking part in the reaction. The equilibrium state is also noticed in certain physical processes such as the melting point of ice at 0℃, both ice and water are present at equilibrium.
In the case of physical processes such as the melting of solid, dissolution of salt in water etc., the equilibrium is called physical equilibrium while the equilibrium associated with chemical reaction is known as chemical equilibrium.
Equilibrium in Chemical changes
The chemical equilibrium in a reversible reaction is the state at which both forward and backward reactions occur at the same speed.
The stage of the reversible reaction at which the concentration of the reactants and products do not change with time is called the equilibrium state.
Read More: Calculating Equilibrium Concentration
Types of Chemical Equilibrium
There are two types of chemical equilibrium:
- Homogeneous Equilibrium
- Heterogeneous Equilibrium
Homogenous Chemical Equilibrium
In this type, the reactants and the products of chemical equilibrium are all in the same phase. Homogenous equilibrium can be further divided into two types: Reactions in which the number of molecules of the products is equal to the number of molecules of the reactants. For example,
- H2 (g) + I2 (g) ⇌ 2HI (g)
- N2 (g) + O2 (g) ⇌ 2NO (g)
Reactions in which the number of molecules of the products is not equal to the total number of reactant molecules. For example,
- 2SO2 (g) + O2 (g) ⇌ 2SO3 (g)
- COCl2 (g) ⇌ CO (g) + Cl2 (g)
Heterogeneous Chemical Equilibrium
In this type, the reactants and the products of chemical equilibrium are present in different phases. A few examples of heterogeneous equilibrium are listed below.
- CO2 (g) + C (s) ⇌ 2CO (g)
- CaCO3 (s) ⇌ CaO (s) + CO2 (g)
Thus, the different types of chemical equilibrium are based on the phase of the reactants and products.
Check Out: Equilibrium Important Questions
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