A New Teaching Laboratory Experiment to Address the Effect of pH on Solubility
| العنوان: | A New Teaching Laboratory Experiment to Address the Effect of pH on Solubility |
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| المؤلفون: | Schmidt, Juan, Ithuralde, Raúl Esteban |
| المصدر: | The chemical educator 22, 70-72. (2017) Memoria Académica (UNLP-FAHCE) Universidad Nacional de La Plata. Facultad Humanidades y Ciencias de la Educación instacron:UNLP-FAHCE SEDICI (UNLP) Universidad Nacional de La Plata instacron:UNLP |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Combined chemical equilibria, Combined Equilibria, Educación, Ciencias de la Educación, Laboratory, CIENCIAS SOCIALES, Solubility, General chemistry, Otras Ciencias de la Educación, Laboratories and Demonstrations, Chemistry Education, Enseñanza de la química, Chemical equilibria |
| الوصف: | This paper presents a teaching experience involving an experiment based on the potentiostatic and electrochemical titration of a silver acetate solution with sodium hydroxide, a chemical system where at least three chemical equilibria are involved. It is known that natural samples are inherently complex, and several different chemical equilibria are simultaneously present. That is why we believe the understanding of complex systems is essential for carrying out chemical analysis. Solubility of many compounds is highly dependent on pH and many of the exercises in the inorganic chemistry classroom are focused on calculating the solubility of different species at different pHs, most of the times using speciation coefficients. However, the dependence of solubility on pH is usually analyzed in a point by point basis. This experiment, which only requires equipment usually available in any general chemistry teaching laboratory, allows students to analyze both a complex system and the dynamic nature of solubility when pH changes continuously in time. It gives them the possibility to reach a broader understanding of simultaneous chemical equilibria. Thus, we consider it to be an excellent complement to typical chemistry exercises. Facultad de Humanidades y Ciencias de la Educación |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1430-4171 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::61fe67b38c214b85eb083c9503293262Test https://www.memoria.fahce.unlp.edu.ar/art_revistas/pr.14803/pr.14803.pdfTest |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.dedup.wf.001..61fe67b38c214b85eb083c9503293262 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14304171 |
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