iii. How are basic buffer solutions prepared?

2. Answer the following in one sentence :

iii. How are basic buffer solutions prepared?

Answer:-

1. Basic buffer solution is prepared by mixing aqueous solutions of a weak base like NH4OH and its salt of a strong acid like NH4Cl. 

2. A weak base is selected according to the required pH or pOH of the solution and dissociation constant of the weak base.