Provide the graph of $\Lambda_{m}$ versus $c^{1/2}$ for aqueous solutions of strong and weak electrolytes,and clarify their differences and uses.

Vedclass pdf generator app on play store
Vedclass iOS app on app store
(N/A) The graph of $\Lambda_{m}$ versus $c^{1/2}$ for aqueous solutions of strong and weak electrolytes is shown below:
Feature Strong Electrolyte (e.g.,$KCl$) Weak Electrolyte (e.g.,$CH_{3}COOH$)
Graph Nature Linear graph. Non-linear (curved) graph.
Kohlrausch Equation Follows $\Lambda_{m} = \Lambda_{m}^{o} - A c^{1/2}$. Does not follow this linear relation.
Determination of $\Lambda_{m}^{o}$ Can be obtained by extrapolating the graph to zero concentration (intercept). Cannot be obtained by extrapolation as the curve becomes parallel to the y-axis at low concentrations.

Uses:
$1$. For strong electrolytes,the graph allows the determination of molar conductivity at infinite dilution $(\Lambda_{m}^{o})$ using the intercept.
$2$. For weak electrolytes,$\Lambda_{m}^{o}$ cannot be determined graphically; it is calculated using Kohlrausch's Law of independent migration of ions.

Explore More

Similar Questions

An electrolyte of a polymer-salt complex of poly(ethylene oxide)-LiCF$_{3}$SO$_{3}$ is shaped into a free standing circular film of $20 \ mm$ diameter and a thickness of $20 \ \mu m$. When it is sandwiched between $2$ stainless steel circular electrodes of the same diameter, this cell exhibits a conductance of $\frac{314}{5} \ S$. What is the specific conductivity of the electrolyte?

What is the expression for the ionisation constant $(K_a)$ of a weak acid $(HA)$ in terms of molar conductivity at infinite dilution $(\Lambda_m^\infty)$ and molar conductivity at a given concentration $(\Lambda_m)$?

Which one of the following graphs between molar conductivity $(\Lambda_m)$ versus $\sqrt{C}$ is correct?

$\Lambda_{m(HAc)}^0$ is equal to . . . . . . .

$\Lambda _m^\circ$ for $NaCl$,$HCl$ and $NaAc$ are $126.4$,$425.9$ and $91.0 \ S \ cm^2 \ mol^{-1}$ respectively. Calculate $\Lambda _m^\circ$ for $HAc$.

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo