A buffer solution can be prepared from a mixture of : Sodium acetate and acetic acid in water, Sodium acetate and HCl in water, Ammonia and ammonium chloride in water, Ammonia and Sodium hydroxide in water

Options

A. Sodium acetate and acetic acid in water
B. Sodium acetate and HCl in water
C. Ammonia and ammonium chloride in water
D. Ammonia and Sodium hydroxide in water

Answer

A, C

Explanation

(A) `CH_(3)COONa + CH_(3)COOH` (Acidic buffer, mixture of salt of `W_(A)//S_(B)` and `W_(A)`)
(B) It is not buffer. [Mixture of salt of `W_(A)//S_(B)` and `S_(A)`]
(C ) `NH_(3) + NH_(4)Cl` (Basic buffer, mixture of `W_(B)` and salt of `W_(A)//S_(A)`)
(D) `NH_(3) + NH_(4)OH` (not buffer , mixture of `W_(B)`)