Constants of Ionization of L-Alanine at Different Ionic Strengths of a Solution and Concentrations of Amino Acid

被引：1
|
作者：
Eshova, G. B. [1 ]
Davlatshoeva, Dzh. A. [2 ]
Rakhimova, M. [1 ]
Miraminzoda, F. [1 ]
Toirzoda, M. A. [3 ]
机构：
[1] Tajik Natl Univ, Res Inst, Dushanbe 734025, Tajikistan
[2] Tajik Natl Univ, Dushanbe 734025, Tajikistan
[3] Pedagog Inst, Dushanbe 734003, Tajikistan
来源：
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2023年 / 97卷 / 10期
关键词：
potentiometry; alanine; concentration; constants of ionization; ionic strength; pH; zwitterions; BETA-ALANINE;
D O I：
10.1134/S0036024423100084
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Processes of alanine ionization are studied via potentiometry at a temperature of 298.15 K and different ionic strengths of a NaHClO4 solution. Constants of the acid's thermodynamic ionization are calculated at three concentrations of alanine. Different empirical and semi-empirical equations are used to calculate the coefficients of ionic activity in terms of the second and third approximations of the Debye-Huckel theory. Values of pK(a1) and pK(a2) are calculated at 298.15 K, solution ionic strengths of 0.1, 0.25, 0.5, 0.75, and 1.0 mol/L, and concentrations of 1.0 x 10(-3)-3.0 x 10(-3) mol/L with a confidence level of P = 0.95.
引用
收藏
页码：2144 / 2148
页数：5
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