Correct answer: 3
A mixture of NH₄OH (ammonium hydroxide) and NH₄Cl (ammonium chloride) forms a basic buffer solution. It contains a weak base and a salt of its strong conjugate acid. It is widely used in qualitative inorganic analysis.
Buffer Solutions:
The solution which resists the change in its pH when some quantity of strong acid or strong base is added is called buffer solution.
Types of Buffer Solutions
There are two types of buffer solutions,
1.Acidic buffer solutions
2. Basic buffer solutions
Acidic Buffer solution:
It can be prepared by mixing of an equimolar amounts of a weak acid and its Strong conjugate base.
Ex:
CH3COOH + CH3COONa
Basic Buffer solution:
It can be prepared by mixing of an equimolar amounts of a weak base and its Strong conjugate acid.
Ex: NH₄OH + NH₄Cl
Question : Which pair will show common ion effect? 1) AgNO₃ + KNO₃ 2) NaCl + HCl 3) NH₄OH + NH₄Cl 4) BaCl₂ + Ba(NO₃)₂