pH Standardization of 0.05 mol·kg-1 Tetraoxalate Buffer at Temperatures from (5 to 45) C with Added KCl Molality up to
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- 作者：Pekka M. Juusola ; Jaakko I. Partanen ; Kari P. Vahteristo ; Pentti O. Minkkinen ; Arthur K. Covington
- 刊名：Journal of Chemical & Engineering Data
- 出版年：2007
- 出版时间：May 2007
- 年：2007
- 卷：52
- 期：3
- 页码：973 - 976
- 全文大小：45K
- 年卷期：v.52,no.3(May 2007)
- ISSN：1520-5134
文摘
The standard pH of 0.05 mol·kg-1 potassium tetraoxalate was determined using the calculation methodrecommended by IUPAC (Pure Appl. Chem. 2002, 74, 2169-2200) at various temperatures from new Harnedcell data and literature data. New data were obtained for 0.05 mol·kg-1 potassium tetraoxalate solution containingup to 1 mol·kg-1 KCl at temperatures of (5, 15, 25, 35, and 45) 
C. One step in the calculation method of IUPACis a linear extrapolation of the experimental quantity p[a(H+)
(Cl-)], where a refers to the activity and refersto the activity coefficient, to zero molality of KCl. The possibilities of using more concentrated KCl solutions inthis determination with nonlinear extrapolations were also investigated.
C. One step in the calculation method of IUPACis a linear extrapolation of the experimental quantity p[a(H+)(Cl-)], where a refers to the activity and refersto the activity coefficient, to zero molality of KCl. The possibilities of using more concentrated KCl solutions inthis determination with nonlinear extrapolations were also investigated.