Question

Aqueous solutions of $HNO_3 \, KOH, \, CH_3COOH$ and $CH_3COONa $ of identical concentrations are provided. The pair(s) of solutions which form a buffer upon mixing is(are)

• A. $ HNO_3$ and $CH_3COOH $
• B. $ KOH$ and $CH_3COONa $
• C. $ HNO_3$ and $CH_3COONa $
• D. $ CH_3COOH$ and $CH_3COONa $

Answer 1

Answer: (C), (D)

In $HNO_3 \,$ and $ CH_3COONa$ combination, if $HNO_3$
is present in limiting amount, it will be neutralised
completely, leaving behind some excess of $CH_3COONa.$