Capewell, Stephen G. and Buchner, Richard and Hefter, Glenn and May, Peter M. (1999) Dielectric relaxation of aqueous Na2CO3 solutions. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1 (8). pp. 1933-1937. ISSN 1463-9076,
Full text not available from this repository.Abstract
The complex dielectric permittivity of aqueous sodium carbonate solutions (0.05 less than or equal to c/mol L-1 less than or equal to 2.5) has been determined in the frequency range 0.2 less than or equal to nu/GHz less than or equal to 20 at 25.0 degrees C with a commercial dielectric measurement system based on a vector network analyser. A superposition of three Debye relaxation processes was necessary to fit the complex permittivity spectra. The slow and intermediate dispersion steps are assigned to double solvent separated (2SIP) and solvent-shared (SSIP) NaCO3-(aq) ion-pairs respectively. The absence of contact ion-pairs was confirmed by Raman spectroscopy. The fast process is assigned to the collective relaxation of the solvent. Equilibrium constants for the formation of NaCO3-(aq) were determined from the ion-pair dispersion amplitudes. The effect of Na2CO3 concentration on the water dispersion amplitude allowed effective solvation numbers to be deduced.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ELECTROLYTE-SOLUTIONS; DISPERSION; FRICTION; SODIUM; WATER; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > PD Dr. Richard Buchner |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 08 Nov 2022 08:25 |
| Last Modified: | 08 Nov 2022 08:25 |
| URI: | https://pred.uni-regensburg.de/id/eprint/48326 |
Actions (login required)
 |
View Item |
