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Titolo:
Conductivity measurements of dilute aqueous HCl solutions to high temperatures and pressures using a flow-through cell
Autore:
Ho, PC; Palmer, DA; Gruszkiewicz, MS;
Indirizzi:
Oak Ridge Natl Lab, Chem & Analyt Sci Div, Oak Ridge, TN 37831 USA Oak Ridge Natl Lab Oak Ridge TN USA 37831 ci Div, Oak Ridge, TN 37831 USA
Titolo Testata:
JOURNAL OF PHYSICAL CHEMISTRY B
fascicolo: 6, volume: 105, anno: 2001,
pagine: 1260 - 1266
SICI:
1520-6106(20010215)105:6<1260:CMODAH>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
ELECTRICAL CONDUCTANCE MEASUREMENTS; THERMODYNAMIC PROPERTIES; HYDROXIDE SOLUTIONS; ION ASSOCIATION; 300 MPA; DIELECTRIC-CONSTANT; HYDROCHLORIC-ACID; 600-DEGREES-C; CHLORIDE; WATER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Ho, PC Oak Ridge Natl Lab, Chem & Analyt Sci Div, POB 2008, Oak Ridge, TN 37831 USA Oak Ridge Natl Lab POB 2008 Oak Ridge TN USA 37831 ge, TN 37831 USA
Citazione:
P.C. Ho et al., "Conductivity measurements of dilute aqueous HCl solutions to high temperatures and pressures using a flow-through cell", J PHYS CH B, 105(6), 2001, pp. 1260-1266

Abstract

The limiting molar conductance Lambda (0) and molal ion association constant K-A(m) of dilute (10(-5) to 10(-3) mol . kg(-1)) aqueous HCl solutions were determined using a flow through conductance cell at temperatures from 100 to 410 degreesC and densities from 0.96 to 0.27 g.cm(-3). The flow-through cell is designed to measure molar conductances of dilute aqueous electrolytes with a high degree of accuracy at high temperatures and low densities. The resulting Lambda (0) values are in general agreement with those reported by Noyes (1907), Wright et al. (1961), Pearson et al. (1963), and Lukashov et al. (1975) for densities that range from 0.7 to 0.3 g.cm(-3) at comparable conditions. However, when compared to values reported by Frantz and Marshall (1984), the new results are in agreement at densities (rho) > 0.5 g.cm(-3), but from 0.5 to ca. 0.4 g.cm(-3), their calculated results are 5-11% higher. Below 0.4 g.cm(-3) where the experimental uncertainties are large, the weighted values from the new study are approximately 14-35% lower. Within experimental uncertainties, the new K-A(m) values are in good agreement with the reported values from Franck (1956), Wright et al. (1961), Pearson et al. (1963), and Lukashov et al. (1975) at densities from 0.7 to 0.3 g.cm(-3) but are only in fair agreement with the Frantz and Marshall valuesat densities above 0.5 g.cm(-3). Below 0.5 g.cm(-3), the latter values are0.5-2.5 log units higher than the new results.

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Documento generato il 09/12/19 alle ore 04:14:33