A new approach in determining limiting molar conductivity value for liquid electrolyte

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Accurate determination of limiting molar conductivity (Λ0) value for an electrolyte at infinite dilution is an important physical quantity that reviews the strength of an electrolyte. Therefore, in this study, a power law comprised of a double-logarithmic plot of electrolytic conductivity (κ) and salt concentration (Csalt) has been introduced to determine Λ0 accurately at a corresponding reference salt concentration (Cref). Furthermore, the reliability of the experimental data is verified after Kohlrausch's law for LiClO4 (aq.) at 25.0°C which is perfectly identical with the reference data. The workability of the power law is tested for LiClO4 (aq.) and LiClO4 in acetonitrile (ACN) at a range of Csalt at 25.0°C. Thus, the Λ0 for both systems correspond at 106 and 177.4 S cm2 mol-1 respectively, after the power law deviated only 2% of the reported value. From the study, it is noted that the corresponding Cref is approximately half of the lowest Csalt concentration that obeys the power law at infinite dilution which responds to Λ0 for an electrolyte system. This alternative method shows a nice linearity for Csalt (10-5 - 10-9 mol cm-3) between the experimental and reference data before it deviates from the linearity above Csalt > 10-5 mol cm-3.

Original languageEnglish
Pages (from-to)758-764
Number of pages7
JournalElectrochimica Acta
Volume147
DOIs
Publication statusPublished - 20 Nov 2014

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Electrolytes
Dilution
Liquids
Salts
Acetonitrile
lithium perchlorate
acetonitrile

Keywords

  • electrolytic conductivity
  • Kohlrausch's law
  • Limiting molar conductivity
  • reference salt concentration

ASJC Scopus subject areas

  • Electrochemistry
  • Chemical Engineering(all)

Cite this

A new approach in determining limiting molar conductivity value for liquid electrolyte. / Hanibah, Hussein; Ahmad, Azizan; Hassan, Nur Hasyareeda.

In: Electrochimica Acta, Vol. 147, 20.11.2014, p. 758-764.

Research output: Contribution to journalArticle

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