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Hydration and ion pairing in aqueous sodium oxalate solutions

Buchner, Richard ; Samani, F. ; May, P. M. ; Sturm, O. ; Hefter, Glenn


Dielec. spectra have been measured for aq. sodium oxalate solns. up to the satn. concn. (0.04 ≤ c [mmol L-1] ≤ 0.25) at 25 °C over the approx. frequency range 0.2 ≤ v [GHz] ≤ 20. The spectra exhibit a process at about 1 GHz assocd. with the presence of ion pairs, in addn. to the dominant solvent relaxation process at about 18 GHz. Detailed anal. of the solvent dispersion amplitude indicates ...


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