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James E. Patterson; Haley N. Hunsaker; Laurel C. Smith; Rebecca L. Sansom; Matthew C. Asplund – Journal of Chemical Education, 2024
Modifications are presented for the iodine clock reaction to introduce the concept of activity and to help students better appreciate molecular aspects of chemical equilibrium. The addition of an unreactive salt affects the activity of the reactants in the iodine clock reaction. The difference in activity affects how long the iodine clock reaction…
Descriptors: Chemistry, Color, Science Education, Time
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Matthew R. Anderson; Cammi J. Dargatz; Tuhina Banerjee; Natasha M. DeVore – Biochemistry and Molecular Biology Education, 2024
Green fluorescent protein has long been a favorite protein for demonstrating protein purification in the biochemistry lab course. The protein's vivid green color helps demonstrate to students the concept(s) behind affinity or ion exchange chromatography. We designed a series of introduction to biochemistry labs utilizing a thermostable green…
Descriptors: Science Education, Biochemistry, Laboratory Experiments, Color
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Brian Zacher; Sam Ferrante; Rances Romero – Journal of Chemical Education, 2023
The dissolution of cobalt­(II) chloride in an appropriate binary alcohol solvent yields an equilibrium mixture, consisting of the differently colored octahedral (pink in color) and tetrahedral (blue in color) cobalt­(II) coordination complexes, which can exhibit a brilliant and reversible pink-to-blue color transition over a ~10 °C window - i.e.,…
Descriptors: Chemistry, Science Education, Thermodynamics, Spectroscopy
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Sofia F. Palme; Andrew H. Johnson; Graeme R. A. Wyllie – Journal of Chemical Education, 2024
A major challenge when designing new experiments for the general chemistry laboratory is introducing students to the necessary techniques while keeping the experiment engaging and accessible. This work presents a new multiweek activity designed to introduce students to advanced instrumentation in the form of high-performance liquid chromatography…
Descriptors: Chemistry, Science Education, Color, Food
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Petra Dunkel; Bence Kontra; Barnaba´s Gere; Vuong Tran; Zolta´n Kaleta – Journal of Chemical Education, 2025
A simple demonstration adaptable to classroom conditions is presented, which involves the preparation of raffle tickets using filter paper and the solution of selected fluorophores. With an appropriate dilution, the text written on the tickets is not visible to the naked eye; however, it becomes readable once put under a UV lamp. Besides being a…
Descriptors: Demonstrations (Educational), Chemistry, Science Education, Scientific Concepts
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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
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Thomas S. Kuntzleman; Andrea Matti; Dajena Tomco – Journal of Chemical Education, 2024
A mixture of salt water and isopropyl alcohol is immiscible, forming two separate liquids with the organic layer on top and aqueous layer on bottom. When universal indicator is added to such a mixture, all of the indicator compounds in the universal indicator preferentially dissolve in the alcohol--except for phenolphthalein at high pH. Mixtures…
Descriptors: Chemistry, Color, Science Education, Scientific Concepts
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Simeen Sattar – Journal of Chemical Education, 2024
Lakes are artists' pigments made from colorants bound to an inert substrate, usually hydrated aluminum oxide. Before the late 19th century, lakes were made from natural pigments extracted from plants and insects, extracted either directly from the dyestuff or indirectly from waste materials generated in the manufacture of dyed textiles. The first…
Descriptors: Color, Science Experiments, Laboratory Experiments, Science Education
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David Menendez; Andrea Marquardt Donovan; Olympia N. Mathiaparanam; Vienne Seitz; Nour F. Sabbagh; Rebecca E. Klapper; Charles W. Kalish; Karl S. Rosengren; Martha W. Alibali – Grantee Submission, 2024
Do children think of genetic inheritance as deterministic or probabilistic? In two novel tasks, children viewed the eye colors of animal parents and judged and selected possible phenotypes of offspring. Across three studies (N = 353, 162 girls, 172 boys, 2 non-binary; 17 did not report gender) with predominantly White U.S. participants collected…
Descriptors: Children, Childrens Attitudes, Beliefs, Genetics
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Tianli Han; Shanshan Yang; Liying Zhu; Xirong Lin; Jinyun Liu – Journal of Chemical Education, 2023
An experimental design by combining hydrogel and ethylenediaminetetraacetic acid disodium salt (EDTA) for visually displaying chemical complexation reactions is developed. The Na[superscript +] ions on the [alpha]-l-guluronic acid (G) unit of the sodium alginate molecule undergo an ion exchange with a divalent cation, so that the G units are…
Descriptors: Chemistry, Science Education, Teaching Methods, Science Experiments
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Lida Khalafi; Nastaran Nikzad; Asayiel Alhajeri; Brandon Bacon; Karla Alvarado; Mohammad Rafiee – Journal of Chemical Education, 2023
The area near the electrode surface is called the diffusion layer, and to understand electrochemistry, it is crucial that students have a knowledge of the phenomena occurring at the diffusion layer. Here, we present a demonstration and activity to visualize and analyze the expansion of a micrometer-sized diffusion layer. The electrode process…
Descriptors: Science Education, Chemistry, Laboratory Equipment, Scientific Concepts
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Júlio Panzera-Gonçalves; Cleida Aparecida Oliveira – Anatomical Sciences Education, 2025
Learning Cell Biology is challenging for both sighted and visually impaired students due to its abstract nature and reliance on bidimensional depictions in textbooks, which often fail to capture the biological complexity of cell structures and functions. To implement inclusive learning environments and address the shortage of learning materials…
Descriptors: Teaching Methods, Computer Simulation, Anatomy, Science Education
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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
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Lena Geuer; Niklas Erdmann; Monika Lorenz; Hannah Albrecht; Tom Schanne; Marcel Cwienczek; Doris Geib; Dorina Strieth; Roland Ulber – Journal of Chemical Education, 2023
In the course of combining the Sustainable Development Goals (SDGs) with the science education curriculum, the relevance of the micro- and macroalgae in education is based on the biotechnological future-oriented significance and the ever-growing trend toward plant-based nutrition. So, the micro- and macroalgae are finding their way onto the food…
Descriptors: Color, Biology, Food, Biotechnology
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Meng Wang; Jingwen He; Wei Lei; Qianfu Luo; Wenjun Wu; Wei-Hong Zhu – Journal of Chemical Education, 2024
The essence of university courses lies in their scientific rigor, while the enjoyment of learning serves as a motivation. In this regard, we have developed a comprehensive experiment project by incorporating dithienylethene-based photochromic units into sensitizers for renewable energy, specifically dye-sensitized solar cells, through organic…
Descriptors: Undergraduate Study, Student Research, College Science, Scientific Concepts
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