ISSN:
1572-8927
Keywords:
Apparent molal volumes
;
partial molal volumes
;
ionic volumes
;
tetraalkylammonium bromides
;
alkali metal halides
;
ultrasonic vibration potential
;
ethylene glycol
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Apparent molal volumes have been measured for several electrolytes in ethylene glycol (EG) and the standard state partial molal volumes, V2°, evaluated. Ultrasonic vibration potentials (uvp) have also been measured for most of the alkali metal halides in EG, and these employed to evaluate ionic partial molal volumes, V° (ion). The results show unambiguously that the uvp is essentially independent of solvent viscosity. The V2° data have also been divided into ionic components by four other techniques including, the method of Mukerjee, the use of Ph4AsBPh4, the correspondence method and an extrapolation of V2° for a series of tetraalkylammonium bromides as a funtion of cation molecular weight. With the exception of the latter technique, all methods used give 30±2 cm3-mol−1 for V° (ion), although the uvp leads to the largest value for V° (ion). The divisions have been analyzed also with the aid of Hepler's equation, and the results suggest that the uvp method gives a more accurate division and that the EG dipole is more hindered than the dipole in ethanol.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00645896
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