Review of osmotic coefficients of aqueous CaCl/sub 2/ at 25/sup 0/C

Journal Article · Fri Apr 01 04:00:00 EST 1977 · J. Chem. Eng. Data; (United States)

DOI:https://doi.org/10.1021/je60073a024· OSTI ID:7313692

Rard, J A; Habenschuss, A; Spedding, F H

New data have become available since Robinson and Stokes' review of the use of CaCl/sub 2/ solutions as isopiestic standards. Electrolyte activity coefficient and water activity determinations for aqueous CaCl/sub 2/ solutions from vapor pressure, isopiestic, freezing point depression, emf, and diffusion coefficient measurements are reviewed here. These activities have been updated to presently accepted values of the physical constants, and vapor pressure measurements have been corrected for the nonideal behavior of the solvent vapor. A semiempirical equation is given which represents the osmotic coefficients of aqueous CaCl/sub 2/ solutions at 25/sup 0/C from 0 to 9 m, to within the experimental uncertainty of the data. This equation is recommended for all isopiestic measurements using a CaCl/sub 2/ standard at 25/sup 0/C.

• Research Organization: Ames Lab., Iowa
• OSTI ID: 7313692
• Journal Information: J. Chem. Eng. Data; (United States), Journal Name: J. Chem. Eng. Data; (United States) Vol. 22:2; ISSN JCEAA
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
152001 -- Geothermal Data & Theory-- Properties of Aqueous Solutions
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400400* -- Electrochemistry
ALKALINE EARTH METAL COMPOUNDS
AQUEOUS SOLUTIONS
CALCIUM CHLORIDES
CALCIUM COMPOUNDS
CALCIUM HALIDES
CHLORIDES
CHLORINE COMPOUNDS
DIFFUSION
DISPERSIONS
DOCUMENT TYPES
ELECTROLYTES
ELECTROMOTIVE FORCE
HALIDES
HALOGEN COMPOUNDS
MELTING POINTS
MIXTURES
OSMOSIS
PHYSICAL PROPERTIES
REVIEWS
SOLUTIONS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
VAPOR PRESSURE