Studies on the Aqueous Solutions of Guanidinium Salts. IX. Activity Coefficients of Biguanide Hydrochloride and Sucrose in Aqueous Ternary Solutions at 25 °C

Autor:	Koichiro Miyajima, Shigeo Nakanishi, Masayuki Nakagaki
Rok vydání:	1979
Předmět:	Activity coefficient chemistry.chemical_compound Aqueous solution Ternary numeral system chemistry Hydrochloride Vapor pressure Inorganic chemistry Urea General Chemistry Flory–Huggins solution theory Ternary operation
Zdroj:	Bulletin of the Chemical Society of Japan. 52:967-973
ISSN:	1348-0634 0009-2673
Popis:	Activity coefficients for the ternary system biguanide·HCl–sucrose–water were determined by the isopiestic vapor pressure method at 25 °C. Biguanide hydrochloride (Bg·HCl) and sucrose each decreased the activity coefficient of the other solute, showing a mutual salting-in effect. The excess free energy of mixing was negative and its magnitude was about twice as large as that of the system urea–sucrose–water. The pair interaction parameter {Bg·HCl–sucrose}g was calculated to be −89.2 (cal mol−2 kg). Thermodynamic properties of this system were found to be similar to those of the system urea–sucrose–water, indicating that Bg·HCl exerted a structure breaking effect on the aqueous solutions of sucrose as urea did.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6acb9fadb75c436a6e8654e513a10a21 https://doi.org/10.1246/bcsj.52.967 Zobrazit plný text záznamu