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Standard potential of the Ag‐AgCl electrode and acidity constant of glycine at constant molality of NaCl in glucose‐water mixed solvents from 278.15 to 318.15 K
Author(s) -
Wang Jie,
Yang JiaZhen
Publication year - 1993
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.19930110303
Subject(s) - molality , chemistry , dissociation constant , solvent , activity coefficient , inorganic chemistry , electrode , reference electrode , analytical chemistry (journal) , thermodynamics , aqueous solution , electrochemistry , chromatography , organic chemistry , biochemistry , physics , receptor
Standard electrode potentials E c of Ag‐AgCl electrode in molality scale and acidity constants of glycine p K 0 1 at constant molality of NaCl (1.0 mol·kg −1 ) in 5 and 15 mass% glucose‐water mixed solvents over a range of temperatures from 278.15 to 318.15 K were determined from precise emf measurements. The dependence of acidity constant on temperature is given as a function of the thermodynamic temperature T by an empirical equation. p K 0 1 = A 1 ( K/T ) ‐ A 2 + A 3 ( T/K ). The corresponding thermodynamic quantities of the first dissociation process of glycine were calculated and the effects of both the solvent and the salt on them were also discussed.