Abstract
The apparent molal volumes of NaCl, NaBr, KCl, KBr, LiCl, and CsCl were measured as a function of salt concentration in 1m and 8m aqueous urea at 25°C. It was found that equations of the form
where the limiting slopeS′ is the same for all the salts in a given concentration of urea, accurately describe the data for salt concentrations less than 1M. The values found forS′ were 1.52 in 1m urea and 1.00 in 8m urea. These are in good agreement with estimated values of the Debye-Hückel limiting slope.
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Welles, H.L., Lindstrom, R.E. The apparent molal volumes of 1:1 electrolytes in urea solution. II. Variation of apparent molal volume with salt concentration. J Solution Chem 5, 155–162 (1976). https://doi.org/10.1007/BF00654332
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DOI: https://doi.org/10.1007/BF00654332