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AIIMS 2017
Exam
AIIMS
Year
2017
Subject
Chemistry
Chapter
Electrochemistry

AIIMS 2017 · Chemistry · Electrochemistry

appropriate molar conductances of the electrolytes listed in the...

appropriate molar conductances of the electrolytes listed in the given table appropriate molar conductances of the electrolytes listed in the given table at infinite dilution in H_2 O at 25^ C .
at infinite dilution in H2O\mathrm{H}_2 \mathrm{O} at 25∘C25^{\circ} \mathrm{C}.

Options

  1. A517.2517.2
  2. B305.0305.0
  3. C390.7390.7
  4. D217.5217.5

Correct answer

C. 390.7390.7

Step-by-step solution

ΛHOAc∞=ΛNaOAc∞+ΛHCl∞−ΛNaCl∞=(91.0+426.2−126.5)Scm2 mol−1=390.7 S cm2 mol−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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