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6.2. Equilibrium - II (icon Equilibrium) — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry6.2. Equilibrium - II (icon Equilibrium)1 Mark
MCQ
An acidic buffer is obtained on mixing
  • A
    $100\, mL$ of $0.1\, M \, CH _{3} COOH$  and $200\, mL$ of $0.1\, M\, NaOH$
  • B
    $100\, mL$ of $0.1\, M\, CH _{3} COOH$ and $100\, mL$ of $0.1\, M\, NaOH$
  • ✓
    $100\,mL$ of $0.1\, M\, HCl$ and $200\, mL$ of $0.1\, M\, CH _{3} COONa$
  • D
    $100\,mL$ of $0.1\, M\, HCl$ and $200\, mL$ of $0.1\, M\, NaCl$
✓

Answer

Correct option: C.
$100\,mL$ of $0.1\, M\, HCl$ and $200\, mL$ of $0.1\, M\, CH _{3} COONa$
c
$HCl + CH _{3} COONa \rightarrow CH _{3} COOH + NaCl$

$10$ mili mol      $20$ mili mol             __                      __

     __                  $10$ mili mol           $10$ mili mol     $10$ mili mol

So finaly we get mixture of

$CH _{3} COOH + CH _{3} COONa$ that will work like acidic buffer solution.

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