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, p K 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.
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Davranche et al. (2003) studied this question.
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