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Studies on the influence of non-electrolytes on the viscosity of an electrolyte solution

✍ Scribed by S. Lakshmanan; K.Nagaraja Rao


Publisher
Elsevier Science
Year
1969
Tongue
English
Weight
501 KB
Volume
14
Category
Article
ISSN
0013-4686

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✦ Synopsis


The effect of various added non-electrolytes of progressively increasing molecular volume such as urea, glycine, glycerol, d-mannitol and sucrose on the viscosity behaviour of aqueous barium chloride solution has been investigated. The viscosity varies exponentially with the ionic strength of barium chloride in presence of these non-electrolytes.

For identical concentrations of different non-electrolytes, at a given temperature, the slopes of log (viscosity) as ionic strength plots are compared; the slopes are functions of the size of the non-electrolytes employed. Using the Andrade-Eyring equation, activation energies for viscous how are evaluated and their implications discussed.

R&sum&Influence

de l'addition de non-electrolytes divers de volume moltculaire progressivement croissant tels que u&e, glycine, glycerol, d-mannitol et sucrose sur le comportement de la viscosite du chlorure de baryum.

Pour des concentrations identiques de differents non-electrolytes, a temperature don&e, les pentes de log(viscosit6) en fonction de la force ionique sont comparees. Elles sont fonction du volume des non-electrolytes employ&. En utilisant l'dquation d'Andrade-Eyring, les energies d'activation du flux visqueux sont BvaluCes et leurs consequences discuttes. Zusanunenfassung-Man untersuchte den Einfluss verschiedener Nicht Elektrolyte von zunehmendem Molekularvolumen wie Harnstoff, Glycin, Glycerol, d-Mannitol und Saccharose auf das Viskositiitsverhalten wlssriger Bariumchloridliisungen. In Gegenwart dieser Nicht-Elektrolyte variierte die Viskositlt exponentiell mit der Ionenst%rke von Bariumchlorid. Ftir eine gegebene Temperatur hangt bei gleichen Konzentrationen an Nicht-Elektrolyt die Steigung der Kurve logviskositat]/ Ionenstarke von der Molektilgrosse des verwendeten Nicht-Elektrolyts ab. Mit Hilfe der Andrade-Eyring-Gleichung wurden die Aktivierungsenergien ftir die viskose St&mung berechnet und ihre Bedeutungen diskutiert.


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