Isopiestic measurements have been carried out at the temperature 298.15 K for two saturated quinary aqueous solutions: (water + sodium chloride + glycine + sorbitol + sucrose) saturated with sodium chloride and glycine and (water + sodium chloride + barium chloride + sorbitol + sucrose) saturated wi
Isopiestic studies on the systems{NaCl + BaCl2 + mannitol( sat)( aq ) } and{KCl + glycine + mannitol( sat )( aq) } at the temperature 298.15 K
β Scribed by Y.-F. Hu; Y.-H. Liu; S.-P. Sun
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 100 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0021-9614
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β¦ Synopsis
Isopiestic measurements have been made for the systems {NaCl + BaCl 2 + mannitol (sat) (aq)} and {KCl + glycine + mannitol (sat) (aq)} at T = 298.15 K. The results agree well with the linear relations for the saturated systems published previously and indicate that if the unsaturated subsystem {(B + C)(aq), where B and C represent the unsaturated solutes} conforms to Zdanovskii's rule and the Stokes and Robinson relation, then the saturated system {(B + C + A 2(sat) )(aq), where A 2 denotes the saturated solute} obeys the relations for the saturated systems.
π SIMILAR VOLUMES
The activity coefficient data were reported for (water + potassium chloride + DL-valine) at T = 298.15 K and (water + sodium chloride + L-valine) at T = 308.15 K. The measurements were performed in an electrochemical cell using ion-selective electrodes. The maximum concentrations of the electrolytes
Isopiestic measurements have been carried out for the quaternary system (water + methanol + sodium bromide + ammonium bromide) with the mass ratios of water : methanol = 9 : 1 and 4 : 1 at the temperature 298.15 K. The results fit the ideal-like solution model within experimental errors.
Liquid + liquid) equilibrium tie-lines were measured for the two quaternary systems = 101.3 kPa. The experimental (liquid + liquid) equilibrium results have been satisfactorily correlated by modified and extended UNIQUAC models both with ternary and quaternary parameters in addition to binary ones.
Measurements of excess molar enthalpies at the temperature 298.15 K in a flow microcalorimeter are reported for the ternary mixture {x A smooth representation of the results is described and used to construct constant-enthalpy contours on a Roozeboom diagram. It is shown that useful estimates of th