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Daniel F. McCain; Evelyn K. McCain – Journal of Chemical Education, 2024
The following activity was developed to allow students to actively participate in and measure the kinetics of a multistep process. Each group of students is given a stack of blank coloring pages, each with a rainbow design printed on it. Each student in a group is given a different color crayon and colors in their portion of the picture before…
Descriptors: Kinetics, Color, Visual Aids, Chemistry
Filgueiras, Matheus Fernandes; Borges, Endler Marcel – Journal of Chemical Education, 2022
Students quantified the protein content in beer, milk, powdered milk, and whey protein using the Bradford assay. The assay was carried out using absorbance measured at 595 nm (standard method) and 96-well-plate images (proposed method). They built analytical curves using bovine serum albumin (BSA) and casein and determined that protein type…
Descriptors: Chemistry, Color, Visual Aids, Science Instruction
Masatada Matsuoka; Jun Koga; Ayaki Miyahara – Journal of Chemical Education, 2023
Thin-layer chromatography, which involves the movement of dyes along a silica-coated plate, is used to observe the progress of chemical reactions and to separate mixtures. We took advantage of this phenomenon to devise a method for generating patterns in the shape of numbers with dots (dot matrix). We prepared the azo dyes necessary for generating…
Descriptors: Color, Scientific Concepts, Chemistry, Visual Aids
Jung, Jiyoung; Dinescu, Adriana; Kukrek, Ahmet – Journal of Chemical Education, 2020
Recently, researchers have paid extensive attention to colorimetric/fluorimetric probe development and its applications in biological and industrial samples. The actual development of such probe molecules, however, often requires an iterative process to achieve certain goals such as selectivity and sensitivity toward a target analyte. In spite of…
Descriptors: College Science, Science Instruction, Chemistry, Kinetics
Leila S. V. Barbosa; Pietra Strauch; Daniele C. M. B. Santos; Maria Grac¸as A. Korn; Rodolfo M. M. Santana – Journal of Chemical Education, 2023
During the pandemic caused by SARS-CoV-2 (COVID-19), a paper analytical device (PAD) was proposed as a tool for remote laboratory classes for undergraduate chemistry to teach calibration curve concepts. For this experiment, students were taught how to prepare a PAD, calibrate standard solutions, construct a calibration curve, and treat data…
Descriptors: Handicrafts, Paper (Material), Visual Aids, Color
Ren, Jolie; Lin, Tiffany; Sprague, Leonard W.; Peng, Iris; Wang, Li-Qiong – Journal of Chemical Education, 2020
Introducing chemical equilibrium concepts in undergraduate general chemistry promotes improved understanding of chemical reactions. We have developed an engaging laboratory experiment exploring the equilibrium of cobalt complexation in alcohols using UV-vis spectroscopy and successfully implemented in a large general chemistry class of 378…
Descriptors: Chemistry, College Science, Laboratory Experiments, Science Experiments
Warzecha, Evan; Berto, Timothy C.; Wilkinson, Chad C.; Berry, John F. – Journal of Chemical Education, 2019
A new undergraduate inorganic chemistry laboratory experiment is presented. An introduction of the spectrochemical series and ligand exchange is explored using the coordination complex dirhodium tetraacetate, Rh[subscript 2](OAc)[subscript 4]. Students have measured the absorption spectra of the Rh[subscript 2] complex in the presence of various…
Descriptors: Laboratory Experiments, Science Instruction, Molecular Structure, Chemistry
Martin, James D.; Nock, Katherine A. – Journal of Chemical Education, 2018
The National Research Council's Framework for K-12 Science Education articulates the need to shift science curricula from being a collection of discrete facts to curricula that integrate core ideas and practices. To help teachers better integrate content and to respond to expressed frustration regarding extensive lists of standards often presented…
Descriptors: Chemistry, Science Instruction, Standards, Teaching Methods