Abstract
Physico-chemical properties of N-Benzyloyl-N '-(8-Chinolylsulfonil)hydrazine The article presents the results of a study of the physicochemical properties of N-benzyloyl -N '-(8-quinolylsulfonyl)hydrazine (BCHS). Using the methods of spectrophotometry, refractometry and gravimetry, the solubility of the reagent in the following solvents was studied: ethanol, 0.1 M KOH solution, toluene, chloroform, hexane. Based on the results, it was shown that BCHS can be used in flotation and extraction processes. The acid-base equilibria in the reagent solutions were investigated. The spectrophotometric method yielded the values of the acid dissociation constants (pKa1 = 12.72 ± 0.35, pKa2 = 14.99 ± 0.29). The stability of BCSG to hydrolysis in alkaline media was studied by spectrophotometric method. It is shown that for four hours the reagent is quite stable; degree of hydrolysis from 3 to 8%. The stalagmometric method determined the surface activity of BCHS. It has been established that the reagent is not a surfactant.
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