The equivalent conductance at infinite dilution of a weak acid such as HF

The equivalent conductance at infinite dilution of a weak acid such as HF
  1. can be determined by extrapolation of measurements of dilute solutions of $\mathrm{HCl}$, $\mathrm{HBr}$ and HI
  2. can be determined by measurement of very dilute HF solutions
  3. can be determined from measurements of dilute solutions of $\mathrm{NaF}, \mathrm{NaCl}$ and $\mathrm{HCl}$
  4. is an undefined quantity

Solution

Kohlrausch Law, $\Lambda_{\mathrm{eq}}(\mathrm{NaF})+\Lambda_{\mathrm{eq}}(\mathrm{HCl})-$
$\Lambda_{\mathrm{eq}}(\mathrm{NaCl})=\Lambda_{\mathrm{eq}}(\mathrm{HF})$

Asked in: JEE-TOPICTESTS-CHEMISTRY

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