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Complexation Studies in the Water-Zinc Acetate-Dimethylsulfoxide System Using the Ultrasonic Method

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Measurements the ultrasonic velocity (at 1.814 MHz) and coefficient of ultrasonic absorption (at 2… 50 MHz) in aqueous solutions of dimethylsulfoxide (DMSO) and zinc acetate Zn(CH3COO)2 at 20°C have been performed. The MATEC equipment was used to these measurements. The investigation of molar volume and molar compressibility excess functions shows on the stronger intermolecular interaction between water and DMSO molecules than water and zinc acetate one. The addition of electrolyte (zinc acetate) to aqueous solutions of nonelectrolyte (DMSO) do not destroy the structure created by an interaction: water-DMSO molecules. This structure is modified trough association the part of molecules of water and DMSO in the solvation's complexes. For the creation of solvation's complexes indication the dependencies of differences in molar volume and molar compressibility between three- and two components solutions. It shows at the creation the solvatomers with a composition of [Zn(H2O)3(DMSO)2]2+. The performed analysis of the measurements of ultrasonic waves attenuation in the range 2–50MHz indicates that in the studied frequency band two relaxation processes occur. These processes are attributed to the disturbance of equilibrium between both the solvation complexes (solvatomers) and outer-outer sphere complexes as well as the outer-sphere complexes.
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Document Type: Research Article

Publication date: 1999-11-01

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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