Journal
JOURNAL OF CHEMICAL EDUCATION
Volume 100, Issue 11, Pages 4472-4481Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jchemed.3c00614
Keywords
Small-Scale Laboratory; Green Chemistry; Iron(III)Analysis; Indian Gooseberry Extract; SustainableLaboratory Model
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This work integrates green chemistry and small-scale chemistry concepts to develop a safe and accessible laboratory model for qualitative and quantitative analysis of iron(III) using an aqueous extract of Indian gooseberry as a natural reagent. The lab boxset, designed for various teaching environments, has been successfully implemented in different contexts and engages a significant number of students and teachers.
In addressing the need for safer and more accessible chemistry lab procedures, this work integrates green chemistry and small-scale chemistry concepts to serve as a laboratory model for both qualitative and quantitative analyses of iron(III). An aqueous extract of Indian gooseberry is utilized as a natural reagent to form a complex with iron(III), resulting in a distinctive dark purple complex. This reaction is selective for iron(III), and the intensity of the color is directly proportional to its concentration in the sample. The lab boxset, designed for a range of teaching environments, emphasizes the use of safe chemicals, straightforward procedures, affordable lab equipment alternatives, and options for home use. From 2021 to 2022, this lab boxset was successfully implemented in three different contexts: during the COVID-19 pandemic, in a typical classroom setting, and at a science teacher training workshop, engaging a total of 205 students and 24 science teachers. The implications of this work extend to both pedagogical practices and the broader goal of promoting sustainable chemistry.
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