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An Easy Determination of the Surface Chemical Properties of Simple and Natural Solids

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Mélanie Davranche , Stella Lacour , François Bordas and Jean-Claude Bollinger

Laboratoire des Sciences de l''Eau et de l''Environnement, Faculté des Sciences, Université de Limoges, 87060 Limoges, France

J. Chem. Educ., 2003, 80 (1), p 76

DOI: 10.1021/ed080p76

Publication Date (Web): January 1, 2003

Section:

Mineralogical and Geological Chemistry

Abstract

Surface chemical properties of simple and natural solids are determined as a result of a rapid and straightforward methodology based on the surface-complexation model. Surface charges of the solid are determined by successive potentiometric titrations with an acid and a base. Solids are considered as amphoteric compounds and the functional surface groups are expressed by a generic binding site, ≡SOH. The intrinsic surface acidity constants, pK_a^S, and the pH of zero point charge, pH_zpc, are calculated. From this tutorial, students gain experience in using both analytical techniques and geochemical modeling principle.

Keywords (Audience):

Second-Year Undergraduate

Keywords (Domain):

Environmental Chemistry

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Acids / Bases

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This article has been cited by 1 ACS Journal articles (1 most recent appear below).

A Simple Adsorption Experiment
Gonzalo Guirado and José A. Ayllón
Journal of Chemical Education2011 88 (5), 624-628
- A Simple Adsorption Experiment
  Gonzalo Guirado and José A. Ayllón
  Journal of Chemical Education2011 88 (5), 624-628
  The study of adsorption phenomenon is one of the most relevant and traditional physical chemistry experiments performed by chemistry undergraduate students in laboratory courses. In this article, we describe an easy, inexpensive, and straightforward way ...
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