Analysis of Highly Concentrated Aqueous Solutions of Alkali Metal Chlorides Using Sonoluminescence Spectroscopy.

The use of the sonoluminescence spectroscopy for the determination of main components in concentrated aqueous solution of alkali metal halides is examined. In concentrated RCl solutions (R = Li, Na, K;  = 100-600 g · dm) the sonoluminescence intensity is inversely proportional to ultrasound frequency in the range from 2 Hz up to 5 Hz. In the CsCl case the inverse proportionality is disturbed at ultrasound frequencies higher than 3 MHz.

Solubility of Al2O3 in some chloride-fluoride melts.

Alumina solubility in chloride-fluoride melts of KCl-NaCl-NaF mixtures with ratios of 0.425:0.425:0.

Potentiometric investigations of carbonate ion stability in molten cesium and sodium iodides.

The reaction of carbonate ion dissociation in molten CsI and NaI was studied in the temperature range from the melting point to 800 (CsI) and 830 degrees C (NaI) by a potentiometric method with the use of a membrane oxygen electrode as an indicator one. The dissociation constant of CO(3)(2-) in the molten iodides was found to increase with the temperature. pK values for CsI are 4.