Preferential Solvation in Mixed Solvents. I. Activity and Hydration of Sodium Chloride in 50 percent Dioxane-Water
Abstract
We have measured orthobaric vapor pressures and vapor densities for the system dioxane-water and have derived the equation of state of the vapors. We have measured activities in the system NaCl- 50 wt % dioxane-water at 25.0 deg. The activity data indicate strong preferential hydration of sodium chloride. The solvation theory of Bjerrun and Stokes and Robinson has been extended to mixed solvents and has resulted in a quantitative measure of relative solvation by the solvent components. The hydration number of sodium chloride at infinite dilution in 50 wt. % dioxane has been found to be 40. The significance of this value is discussed in relation to other values. The concentration dependence of the activity coefficient of sodium chloride in 50 wt. % dioxane is found to resemble that of sodium chloride in water at concentrations greater than 0.1 m.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1953
- Accession Number
- AD0029418
Entities
People
- A. L. Bacarella
- Arthur Finch
- Ernest Grunwald
Organizations
- Florida State University