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Rigorous Potentiometric Determination of Metal Complexes Stability Constants: An Undergraduate Laboratory Practice

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Graciela M. Escandar and Luis Federico Sala

Departamento de Química Física, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, Rosario 2000, Argentina

J. Chem. Educ., 1997, 74 (11), p 1329

DOI: 10.1021/ed074p1329

Publication Date (Web): November 1, 1997

Section:

History, Education, and Documentation

Abstract

In the present work an undergraduate laboratory practice is described corresponding to both experimental and computational methods used in potentiometric equilibrium constants determinations. As an example of these determinations the system formed by Cu(II) and D-galacturonic acid was selected. Both the deprotonation constant for the ligand and the equilibrium constants for the metal chelates were determined by using the program BEST.

Keywords (Audience):

Upper-Division Undergraduate

Keywords (Domain):

Analytical Chemistry

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Equilibrium

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Received: August 03, 2009

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Rigorous Potentiometric Determination of Metal Complexes Stability Constants: An Undergraduate Laboratory Practice