Question

A buffer solution is one which has

(A) Reserve acidity

(B) Reserve alkalinity

(C) pH equal to zero

(D) Reserve acidity and reserve alkalinity

Answer 1

(D) Reserve acidity and reserve alkalinity

A buffer solution is one which maintains its pH fairly constant even upon the addition of small amounts of acid or base.

Two common types of buffer solutions are : 

1. a weak acid together with a salt of the same acid with a strong base. These are called acid buffers, 

(eg): CH_3​COOH + CH₃​COONa  

2. a weak base Mid its salt with a strong acid. These are called basic buffers,

(eg) : NH₄​OH + NH_4​Cl