The literature data on the concentration and temperature dependence of densities of aqueous solutions of alkali halides are analysed using a new power-law approach. Theoretical models based on additivity rule for densities and polarization of solvent around electrolyte ions are proposed and the origin of the power-law expression is discussed. The results suggest that the latter model qualitatively relates the parameters of the power-law expression with the physical processes occurring in solutions.
Keywords: alkali halides, densities of aqueous solutions, power-law approach, solution structure
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