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Determination of Equilibrium Constants of Metal Complexes from Spectrophotometric Measurements. An Undergraduate Laboratory Experiment

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Gabriela A. Ibañez , Alejandro C. Olivieri and Graciela M. Escandar

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

J. Chem. Educ., 1999, 76 (9), p 1277

DOI: 10.1021/ed076p1277

Publication Date (Web): September 1, 1999

Section:

History, Education, and Documentation

Abstract

We describe an undergraduate laboratory practice involving the determination of complex equilibrium constants by spectrophotometric techniques. The results are obtained through model fitting using a computer program. As an example of these determinations, salicylic acid was selected and evaluated in the presence of copper(II) ion. The experimental conditions, general procedures, and computational strategem are discussed.

Keywords (Audience):

Upper-Division Undergraduate

Keywords (Domain):

Laboratory Instruction

Keywords (Subject):

Instrumental Methods

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Received: August 03, 2009

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Determination of Equilibrium Constants of Metal Complexes from Spectrophotometric Measurements. An Undergraduate Laboratory Experiment

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Spectrophotometric determination of an equilibrium constant

Iron(III) Thiocyanate Revisited: A Physical Chemistry Equilibrium Lab Incorporating Ionic Strength Effects

Salicylate Detection by Complexation with Iron(III) and Optical Absorbance Spectroscopy. An Undergraduate Quantitative Analysis Experiment

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