Green Analytical Chemistry Laboratory Boxset: From the Lab-at-Home during COVID-19 to a Science Teacher Training

Abstract

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.