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AIIMS 2010
Exam
AIIMS
Year
2010
Subject
Chemistry
Chapter
Electrochemistry

AIIMS 2010 · Chemistry · Electrochemistry

Calculate _ H O A C ^ ∞ using appropriate molar conductances of the...

Calculate _ H O A C ^ ∞ using appropriate molar conductances of the electrolytes listed above at infinite dilution in
Calculate ΛHOAC∞\Lambda_{H O A C}^{\infty} using appropriate molar conductances of the electrolytes listed above at infinite dilution in H2O\mathrm{H}_2 \mathrm{O} at 25∘C25^{\circ} \mathrm{C}.

Options

  1. A517.2
  2. B552.7
  3. C390.7
  4. D217.5

Correct answer

C. 390.7

Step-by-step solution

ΛHOAC∞=ΛNaOAC∞+ΛHCl∞−ΛNaCl∞=91.0+426.2−126.5Scm2mol−1=390.7Scm2mol−1\begin{aligned}& \Lambda_{\mathrm{HOAC}}^{\infty}=\Lambda_{\mathrm{NaOAC}}^{\infty}+\Lambda_{\mathrm{HCl}}^{\infty}-\Lambda_{\mathrm{NaCl}}^{\infty} \\ & =91.0+426.2-126.5 \mathrm{ S} \mathrm{ cm}^2 \mathrm{ mol}^{-1}\\ & =390.7 \mathrm{ S} \mathrm{ cm}^2 \mathrm{ mol}^{-1} \end{aligned}$$
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