Combined use of freeware and analytical techniques to improve the understanding of chemical equilibrium diagrams
Abstract
In the present work, the advantages of combining the use of the freeware Spana to plot equilibrium diagrams with different laboratory analytical techniques have been investigated. The software Spana has been used to plot speciation diagrams of different solutions of phosphoric acid and its salts. The resulting diagrams have been correlated with the results obtained by conductimetric titration and colorimetry under the framework of the realization of a Master Thesis by a student of Chemical Engineering. The results achieved demonstrate that the combined use of experimental techniques and user-friendly software aid in the comprehension of the relevance that shifts in the chemical equilibrium could have on different engineering processes by students of Chemical Engineering. The proposed methodology reduces the time that students need to understand problems related to chemical equilibria and could be implemented, not only during the completion of Master Thesis’, but also in laboratory courses related with subjects of Chemical Analysis.
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