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 language | English |
|---|---|
| Pages (from-to) | 758-764 |
| Number of pages | 7 |
| Journal | Electrochimica Acta |
| Volume | 147 |
| DOIs | |
| Publication status | Published - 20 Nov 2014 |
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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 journal › Article
}
TY - JOUR
T1 - A new approach in determining limiting molar conductivity value for liquid electrolyte
AU - Hanibah, Hussein
AU - Ahmad, Azizan
AU - Hassan, Nur Hasyareeda
PY - 2014/11/20
Y1 - 2014/11/20
N2 - 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.
AB - 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.
KW - electrolytic conductivity
KW - Kohlrausch's law
KW - Limiting molar conductivity
KW - reference salt concentration
UR - http://www.scopus.com/inward/record.url?scp=84908606502&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84908606502&partnerID=8YFLogxK
U2 - 10.1016/j.electacta.2014.09.156
DO - 10.1016/j.electacta.2014.09.156
M3 - Article
AN - SCOPUS:84908606502
VL - 147
SP - 758
EP - 764
JO - Electrochimica Acta
JF - Electrochimica Acta
SN - 0013-4686
ER -