Accession Number : AD0672359

Title :   ULTRASONIC STUDIES OF DIFFUSION CONTROLLED IONIC ASSOCIATION-DISSOCIATION.

Descriptive Note : Technical rept.,

Corporate Author : CASE-WESTERN RESERVE UNIV CLEVELAND OHIO ULTRASONICS RESEARCH LAB

Personal Author(s) : Goldfarb,Louis ; Yeager,Ernest

Report Date : 01 JAN 1968

Pagination or Media Count : 95

Abstract : Ultrasonic absorption measurements have been made in solutions of copper sulfate, magnesium sulfate, and cobalt sulfate over the frequency range 45 to 550 MHz using pulse modulated waves and a send-receive technique. The excess relaxational absorption data were computer processed and the relaxation times calculated. These results indicate that the high frequency relaxation for di-divalent electrolytes occurs at substantially higher frequencies than reported by earlier workers and is concentration dependent. On the basis of the values for partial molal volume changes, energies of activation, concentration dependence, deuteration effects, and foreign electrolyte effects, the high frequency absorption peak has been attributed to the diffusion controlled second order process leading to the formation of an encounter complex. The report also discusses possible difficulties arising from the lack of data for the non-relaxing portion of the absorption with the ionic constituents present. (Author)

Descriptors :   (*ELECTROLYTES, *ULTRASONIC PROPERTIES), (*SULFATES, ULTRASONIC PROPERTIES), COPPER COMPOUNDS, COBALT COMPOUNDS, MAGNESIUM COMPOUNDS, DISSOCIATION, RECOMBINATION REACTIONS, DIFFUSION, RELAXATION TIME, HEAT OF ACTIVATION, CONCENTRATION(CHEMISTRY), DEUTERIUM COMPOUNDS, ABSORPTION SPECTRA, IMPURITIES, COMPLEX COMPOUNDS

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE