文章基本信息

标题：Avaliao de medidas de pH de amostras de água mineral engarrafada como proposta para o ensino de ácidos e bases em nível superior
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作者：Geovane Aparecido Ramos da Silva ; Victor Hugo Maldonado Cruz ; Patrícia Daniele Silva dos Santos 等
期刊名称：Research, Society and Development
电子版ISSN：2525-3409
出版年度：2022
卷号：11
期号：4
页码：1-13
DOI：10.33448/rsd-v11i4.26465
语种：English
出版社：Grupo de Pesquisa Metodologias em Ensino e Aprendizagem em Ciências
摘要：Comparative pH analyses were performed on sparkling and mineral water by three distinct methods: pH meter, pH indicator strips, and a universal pH indicator; to present an investigation as a proposal to aid teaching Acid-Base theories for undergraduate students using “Chemistry behind carbonated waters” as theme. Thus, pH values for carbonated and mineral waters were measured and compared with those described in the label, and a discussion was presented for each method employed to gauge pH. A discussion was held to bring students different, more comprehensive acid-base concepts, aiming to expand their knowledge of the subject, and introduce them to new subjects, starting from a simple pH measurement and reaching the calculations required to determine the content of CO2 dissolved in carbonated water samples. Furthermore, data were compared with the current legislation to avoid fraud. Hence, our paper covers acid-base concepts and expands this subject to other areas of chemistry by utilizing contextualization as a teaching strategy.
关键词：Contextualization;Experimentation;Chemistry education;pH;Gas dissolution.