Ultrasonic Relaxation of C11SO4 in H2O Ethylene Glycol Mixtures at 25°C
Measurements of ultrasonic absorption of CuSO4 solutions in H2O at 20 °C and 25 °C and in ethylene glycol mixtures at 25 °C are reported for the frequency range 15 to 275 MHz. A single relaxation, shifting to lower frequency with increasing concentration, of ethylene glycol is observed. The high frequency value of the sound absorption for the electrolyte solutions is however larger than the one for the corresponding solvent mixtures. This is discussed either in terms of the possible existence of other relaxations at higher frequencies or in terms of a change or the absorption of the solvent upon addition of the electrolyte at high frequency. The observed relaxations are interpreted as due to a process of ionic association between Cu+2 and SO4 −2. A model utilizing two steps seems to represent satisfactorily the data. The rate constants of the ligand penetration in the first coordination sphere of the metal decrease as the glycol concentration increases. This is interpreted as due to the formation of Cu+2-glycol complexes in accord with well known findings of inorganic chemistry.
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Document Type: Research Article
Publication date: December 1, 1970
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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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