Possible time-dependent effect of ions and hydrophilic surfaces on the electrical conductivity of aqueous solutions

Autor: Igor Jerman, Rok Krašovec, Peter Bukovec, Nada Verdel, Marija Zupančič
Rok vydání: 2012
Předmět:
Work (thermodynamics)
autothixotropy
anorganska kemija
Conductivity
šibki geli
zelo razredčene raztopine
lcsh:Chemistry
lcsh:QH301-705.5
Spectroscopy
Aqueous solution
udc:546.212:544.35:544.022.822
Chemistry
General Medicine
Computer Science Applications
Dilution
avtotiksotropija
Solutions
Hydrophobic and Hydrophilic Interactions
fizikalna kemija
vodne raztopine
extremely dilute solutions
water
Nanotechnology
električna prevodnost
Catalysis
Article
Ion
struktura
Inorganic Chemistry
Laboratory flask
Electrical resistivity and conductivity
hidrofobne površine
Exclusion zone
Physical and Theoretical Chemistry
Molecular Biology
exclusion zone
Mechanical Phenomena
Ions
Organic Chemistry
Electric Conductivity
ioni
Carbon Dioxide
tekočine
hidrofobnost
Chemical engineering
lcsh:Biology (General)
lcsh:QD1-999
molekule
voda
conductivity
Zdroj: International Journal of Molecular Sciences
International Journal of Molecular Sciences, Vol 13, Iss 4, Pp 4048-4068 (2012)
International journal of molecular sciences, vol. 13, no. 4, pp. 4048-4068, 2012.
Volume 13
Issue 4
Pages 4048-4068
ISSN: 1422-0067
1661-6596
Popis: The purpose of this work was to determine the influence of mechanical and electrical treatment on the electrical conductivity of aqueous solutions. Solutions were treated mechanically by iteration of two steps: 1:100 dilution and vigorous shaking. These two processes were repeated until extremely dilute solutions were obtained. For electrical treatment the solutions were exposed to strong electrical impulses. Effects of mechanical (as well as electrical) treatment could not be demonstrated using electrical conductivity measurements. However, significantly higher conductivity than those of the freshly prepared chemically analogous solutions was found in all aged solutions except for those samples stored frozen. The results surprisingly resemble a previously observed weak gel-like behavior in water stored in closed flasks. We suggest that ions and contact with hydrophilic glass surfaces could be the determinative conditions for the occurrence of this phenomenon.
Databáze: OpenAIRE
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