Abstract
The absorption of ultrasonic waves in the frequency range from 6 to 146 MHz in aqueous solutions of sodium acetate, sodium chloride and calcium has been studied. It was found that only in solutions of calcium cations and acetate anion present simultaneously, relaxation absorption of ultrasonic waves is observed. The experimental data obtained indicate that the observed relaxation absorption of ultrasound in the studied frequency range by an aqueous solution of calcium acetate is associated with the interaction of the acetate anion with the calcium cation in the solution.
Highlights
The absorption of ultrasonic waves in the frequency range from 6 to 146 MHz in aqueous solutions of sodium acetate, sodium chloride and calcium has been studied
The analysis of the literature data and our studies show that relaxation absorption of ultrasonic waves (US) occurs in aqueous solutions of acetates of double-charged cations
Our studies have shown that, in contrast to solutions composed of individual components of mixtures, in solutions containing both CaCl2 and CH3COONa, there is a noticeable relaxation absorption of US (Fig. 3)
Summary
The absorption of ultrasonic waves in the frequency range from 6 to 146 MHz in aqueous solutions of sodium acetate, sodium chloride and calcium has been studied. Taking into account the results obtained, we can assume that associates of C1 - C2+ and CH3COO - C2+ ions can be formed in the solution, and excessive absorption of US in an aqueous solution of calcium acetate is associated with a violation of the equilibrium concentrations of these associates, i.e., with the interaction of the calcium cation and the acetate anion.
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