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

• Mélanie Davranche ^[1] ; Stella Lacour ^[1] ; François Bordas ^[1] ; Jean-Claude Bollinger ^[1]
  1. [1] University of Limoges

     University of Limoges

     Arrondissement de Limoges, Francia

     
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 80, Nº 1, 2003, pág. 76
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • 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, pKaS, and the pH of zero point charge, pHzpc, are calculated. From this tutorial, students gain experience in using both analytical techniques and geochemical modeling principle.