First slide

Acidic buffer

Question

Which of the following pairs constitutes buffer ?

Easy

A

${HNO}_{3} and {NH}_{4} {NO}_{3}$
B

HCl and KCl
C

${HNO}_{2} and {NaNO}_{2}$
D

NaOH and NaCl

Solution

The mixture containing a weak acid $({HNO}_{2})$ and its conjugate base $({NO}_{2}^{-})$ acts as acidic buffer.

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