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Physico-chemical properties of concentrated solutions of some tetraalkylammonium salts in formamide in the temperature range 25–80°

✍ Scribed by Mario Della Monica; Sabino Bufo

Publisher
Elsevier Science
Year
1977
Tongue
English
Weight
511 KB
Volume
22
Category
Article
ISSN
0013-4686

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✦ Synopsis

In this work density and viscosity measurements for concentrated solutions in formamide of Bu,NJ, Bu.,NBr, Bu,NCl, Pr&NJ salts in the temperature range 25-80" are reported. The apparent molar volumes 4~ are square root linear functions of the salt concentration. The values of the partial molar volumes v, dmease when the concentration increases and more over are almost constant at the last concentration used. Viscosity data have been analysed using Vand-Einstein model on viscosity of rigid sphere suspensions. In the diluted solution range a diierent behaviour between tetraalkylammonium salt solutions and alkaline and alkaline-earth metal ones is shown. This difference is interpreted by supposing that &he size of alkaline, alkaline-earth metal solvated cations varies with cnncentration, while the size of tetraalkylammonium solvated cations is unchangeable.

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