Line Coordinate Chart for Vapor Pressures of Saturated Aqueous Solutions

1941 ◽  
Vol 33 (10) ◽  
pp. 1278-1278
Author(s):  
D. S. Davis
Keyword(s):  
Aqueous Solutions ◽  
Vapor Pressures ◽  
Coordinate Chart

Vapor pressures of aqueous solutions of (silver, thallium, sodium) nitrate at 98.5.degree.C

1980 ◽  
Vol 25 (4) ◽  
pp. 331-332 ◽  
Author(s):  
Marie Christine Abraham ◽  
Maurice Abraham ◽  
James Sangster
Keyword(s):  
Aqueous Solutions ◽  
Sodium Nitrate ◽  
Vapor Pressures

VAPOR PRESSURES OF AQUEOUS SOLUTIONS OF SILVER NITRATE, OF AMMONIUM NITRATE, AND OF LITHIUM NITRATE

1956 ◽  
Vol 34 (2) ◽  
pp. 151-159 ◽  
Author(s):  
A. N. Campbell ◽  
J. B. Fishman ◽  
G. Rutherford ◽  
T. P. Schaefer ◽  
L. Ross
Keyword(s):  
Aqueous Solutions ◽  
Silver Nitrate ◽  
Direct Determination ◽  
Lithium Ion ◽  
Silver Ions ◽  
Lithium Nitrate ◽  
Vapor Pressures ◽  
Heats Of Dilution ◽  
Water Of Hydration

This paper is devoted to the direct determination of the vapor pressures of solutions of the nitrates of silver, of ammonium, and of lithium, at temperatures varying from 30 °C. to 105 °C. and at concentrations varying from 10 to 85 weight % (for lithium nitrate, the limited solubility precluded measurements beyond 65%). From the vapor pressures, the enthalpies of evaporation of water (by a modification of the Clapeyron–Clausius equation), the differential heats of dilution, and the activities of water (as compared with the mole fractions of the solvent) have been calculated. From the results we conclude that the water of hydration of the ammonium and silver ions (if, indeed, these ions are hydrated at all) is very loosely attached, while that of the lithium ion is strongly bound.

Equilibrium Vapor Cell for Quantitative IR Absorbance Measurements

1996 ◽  
Vol 50 (10) ◽  
pp. 1307-1313 ◽  
Author(s):  
Paul E. Field ◽  
Roger J. Combs ◽  
Robert B. Knapp
Keyword(s):  
Aqueous Solutions ◽  
Gas Flow ◽  
Pure Component ◽  
Organic Solutes ◽  
Vapor Pressures ◽  
Water Solvent ◽  
Beer's Law ◽  
Solution Preparation ◽  
Beer’S Law

Infrared absorbance measurements through a gas flow cell are made with the closed-loop circulation of vapor/air mixtures equilibrated with the use of temperature-regulated aqueous solutions. Constant reproducible vapor pressures of organic solutes are established with the equilibrated aqueous solutions. The water solvent depresses the vapor pressure of the pure organic solutes of methanol, ethanol, isopropanol, acetone, and methyl ethyl ketone (MEK). Knowledge of the solution liquid mole fractions, the pure component vapor pressures, and the Wilson coefficients permits determination of the solute vapor pressures to within 2% accuracy. Reliable aqueous solution preparation requires only the correct weighings of pure constituent materials before mixing to achieve the targeted solute liquid mole fractions. Absorbances are measured for four of the five solutes over a range of seven concentrations and for MEK over four concentrations. These concentrations show the absorbance region of adherence to Beer's law with an experimental precision of approximately ±2% for the solutes studied. Absorptivities that are calculated from the Beer's law slope are compared to the available infrared absorbance data.

Sign in / Sign up

Export Citation Format

Share Document