Hygrometric determination of the water activities and the osmotic and activity coefficients of (ammonium chloride+ sodium chloride + water) atT= 298.15 K

2002 ◽  
Vol 34 (6) ◽  
pp. 783-793 ◽  
Author(s):  
Abderrahim Dinane ◽  
Mohamed El Guendouzi ◽  
Abdelfetah Mounir
Keyword(s):  
Sodium Chloride ◽  
Ammonium Chloride ◽  
Activity Coefficients ◽  
Chloride Water

THE RECIPROCAL SALT-PAIR SYSTEM: SODIUM CHLORIDE – AMMONIUM SULPHITE – SODIUM SULPHITE – AMMONIUM CHLORIDE – WATER AT 20 °C. AND 60 °C.: PART I. TERNARY SYSTEMS

1955 ◽  
Vol 33 (5) ◽  
pp. 774-786 ◽  
Author(s):  
J. A. Labash ◽  
G. R. Lusby
Keyword(s):  
Sodium Chloride ◽  
Ammonium Chloride ◽  
Solid Solutions ◽  
Ternary Systems ◽  
Sodium Sulphate ◽  
Sodium Sulphite ◽  
Solubility Data ◽  
Published Data ◽  
Double Salts ◽  
Chloride Water

Solubility data have been obtained at 20 °C. and 60 °C. for the following ternary systems:[Formula: see text]No evidence of the formation of double salts or of solid solutions in the first three systems was obtained. Ammonium sulphite monohydrate does not appear to dehydrate at 60 °C. in solutions saturated with sodium sulphite or ammonium chloride. In the study of the NaCl–NH4Cl–H2O system, the data agree with average values obtained from the literature and some discrepancies in the published data have been noted. In the NaCl–Na2SO3–H2O system some anomalous results can be explained on the basis of the existence of solid solutions of the hydrated and anhydrous forms of sodium sulphite and sodium sulphate.

THE RECIPROCAL SALT-PAIR SYSTEM: SODIUM CHLORIDE – AMMONIUM SULPHITE – SODIUM SULPHITE – AMMONIUM CHLORIDE – WATER AT 20 °C. AND 60 °C.: PART II: THE QUATERNARY SYSTEM

1955 ◽  
Vol 33 (5) ◽  
pp. 787-796 ◽  
Author(s):  
J. A. Labash ◽  
G. R. Lusby
Keyword(s):  
Sodium Chloride ◽  
Ammonium Chloride ◽  
Solid Solutions ◽  
Quaternary System ◽  
Sodium Sulphate ◽  
Sodium Sulphite ◽  
Chloride Water ◽  
Solid Phases ◽  
System Sodium

In the above quaternary system at 60 °C., besides those representing the four salts at the corners of the Janecke diagram two other saturation areas were found. At 20 °C. there are three, and possibly more than three additional areas. In the course of the present work it was not possible to establish the nature of the solid phases in these additional areas of the quaternary system. However, the data of Lewis and Rivett suggest that at least some of these unknown areas may indicate the presence of different solid solutions of sodium sulphate in sodium sulphite. This quaternary system appears to be a rather complex one and much further work remains to be done in order to complete the knowledge of it at 60 °C. and 20 °C., particularly at the latter temperature.

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