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New Method for the Determination of Ionization Constants of Polyprotic Weak Acid(PDF)

Transactions of Tianjin University[ISSN:1006-4982/CN:12-1248/T]

Issue:
2003年02期
Page:
98-100
Publishing date:

Info

Title:
New Method for the Determination of Ionization Constants of Polyprotic Weak Acid
Author(s):
WANG Jing kang HAO Hong xun
(School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China)
Keywords:
DOI:

Abstract:
A new method for the determination of ionization constants of polyprotic weak acids is presented. Based on dissociation equilibrium,mass balance and charge balance, the mathematic model is established and the non linear least squares Gauss Newton method is applied to numerically solve the model equations. In order to get the concentration of hydrogen ion, the Debye Hückel equation is used to calculate its activity coefficient. The ionization constants of H 2SO 3 and H 2C 2O 4 obtained by this method are in good agreement with the literature values.

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Last Update: 2011-05-02