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Question: Answered & Verified by Expert
Aqueous solutions of $\mathrm{HNO}_3, \mathrm{KOH}$, $\mathrm{CH}_3 \mathrm{COOH}$, and $\mathrm{CH}_3 \mathrm{COONa}$ of identical concentrations are provided. The pair(s) of solutions which form a buffer upon mixing is(are)
ChemistryIonic EquilibriumJEE AdvancedJEE Advanced 2010 (Paper 1)
Options:
  • A
    $\mathrm{HNO}_3$ and $\mathrm{CH}_3 \mathrm{COOH}$
  • B
    $\mathrm{KOH}$ and $\mathrm{CH}_3 \mathrm{COONa}$
  • C
    $\mathrm{HNO}_3$ and $\mathrm{CH}_3 \mathrm{COONa}$
  • D
    $\mathrm{CH}_3 \mathrm{COOH}$ and $\mathrm{CH}_3 \mathrm{COONa}$
Solution:
1055 Upvotes Verified Answer
The correct answers are:
$\mathrm{HNO}_3$ and $\mathrm{CH}_3 \mathrm{COONa}$
,
$\mathrm{CH}_3 \mathrm{COOH}$ and $\mathrm{CH}_3 \mathrm{COONa}$
$\mathrm{HNO}_3$ and $\mathrm{CH}_3 \mathrm{COONa}$ can form buffer if the amount of $\mathrm{HNO}_3$ is limited. However concentrations are same but the amount can differ with manipulation of volume.
Ionic equilibrium
Conceptual
II

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