Density gradient proportionality constants for a number of aqueous binary solutions

✍ Scribed by James B. Ifft; William R. Martin III; Kathleen Kinzie

• Publisher: Wiley (John Wiley & Sons)
• Year: 1970
• Tongue: English
• Weight: 926 KB
• Volume: 9
• Category: Article
• ISSN: 0006-3525
• DOI: 10.1002/bip.1970.360090505

✦ Synopsis

Abstract

A computer program, based upon the method of Trautman, has been developed to calculate density‐gradient proportionality constants, β^0^, as a function of density for any salt for which density and activity coefficient data are available. Results are given for twenty 1:1 electrolytes at 25°C. These salts are the chlorides, bromides, iodides, and nitrates of the five alkali cations. The program is available for use for any other salt and for a variety of temperatures if the necessary data can be found or measured. Between six and eleven centrifuge runs at different densities were performed fur each of seven of these salts experimentally to determine β^0^. In general, the experimental and theoretical values agree within 3% except at the extremes of density. This demonstrates the validity of the computer program and is the first extensive demonstration that the thermodynamic calculation of density gradients is correct. Five new quadratic relationships between refractive index and density are given.