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Abraham, Liza – Journal of Chemical Education, 2020
This paper revisits the tie-dyeing process through a bioinspired and safer alternative to nucleophilic aromatic substitution (S[subscript N]Ar) reactions for an introductory organic chemistry laboratory. The simple and straightforward experiment provides students with an opportunity to gain practical experience in conducting a chemical reaction in…
Descriptors: Organic Chemistry, Introductory Courses, College Science, Science Experiments
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Gonçalves, Bárbara Rezende; Silva-Caldeira, Priscila Pereira – Journal of Chemical Education, 2019
Most didactic lab experiments deal with the influence of temperature, concentration, pressure, surface area, and catalysts on chemical kinetics; however, few of them explore the influence of light radiation and the presence of inhibitor agents on reaction rates. In order to investigate the effects of the radiation source and the presence of…
Descriptors: Light, Food, Laboratory Experiments, Science Experiments
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Ng, Enoch Ming Wei; Song, Zhixiong; Yau, Chin Doong; Liew, Oi Wah; Ng, Tuck Wah – Journal of Chemical Education, 2021
The reaction between hydrochloric acid and calcium carbonate to produce carbon dioxide gas is a popular and engaging experiment to illustrate chemical reactions that result in the production of gases. It also provides a useful model for teaching concepts related to the effects of concentration on reaction rates. Although a prepared hydrochloric…
Descriptors: Science Experiments, Laboratory Experiments, Laboratory Safety, Chemistry
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Hill, Robert H., Jr. – Journal of Chemical Education, 2021
Numerous fires during demonstrations in secondary schools, museums, and science centers have occurred while using flammable liquids. This calls to light the need to educate undergraduate students and educators in the safe handling and use of these flammable chemicals. Understanding the benefits and risks of flammable liquids should be an essential…
Descriptors: Fire Protection, Laboratory Safety, Undergraduate Students, Knowledge Level
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Abdinejad, Maryam; Talaie, Borzu; Qorbani, Hossain S.; Dalili, Shadi – Journal of Science Education and Technology, 2021
Visualizing molecular conformations and complex compound structures and chemical transformations in 3D is one of the most difficult tasks for undergraduate chemistry students. Modern computational technologies have revolutionized every aspect of our lives, including education. As a result, many researchers and educators are working on enhancing…
Descriptors: Visualization, Molecular Structure, Educational Technology, Technology Uses in Education
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Renner, Melissa; Griesbeck, Axel – Journal of Chemical Education, 2020
Due to immense cost reduction and routine commercial availability, 3D printing has become the cutting-edge technology with enormous potential--also for educational and applied chemistry. It opens the opportunity to print custom-made reactors, such as (micro) flow reactors. In addition, 3D-printing technology can simplify chemical reactions, such…
Descriptors: Printing, Computer Peripherals, Models, Chemistry
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Short, Duncan – School Science Review, 2017
Activation energies form an energy barrier to a chemical reaction taking place. Simple collision theory, i.e. that particles need to collide to react, would suggest that activation energy is the energy needed to overcome a coulombic barrier provided by the negatively charged electrons contained within energy shells surrounding an atomic nucleus.…
Descriptors: Science Instruction, Energy, Chemistry, Barriers
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Miranda, E. N. – European Journal of Physics, 2010
Entropy generation in a chemical reaction is analysed without using the general formalism of non-equilibrium thermodynamics at a level adequate for advanced undergraduates. In a first approach to the problem, the phenomenological kinetic equation of an elementary first-order reaction is used to show that entropy production is always positive. A…
Descriptors: Thermodynamics, Physics, Chemistry, Scientific Concepts
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Herrmann-Abell, Cari F.; Koppal, Mary; Roseman, Jo Ellen – CBE - Life Sciences Education, 2016
Modern biology has become increasingly molecular in nature, requiring students to understand basic chemical concepts. Studies show, however, that many students fail to grasp ideas about atom rearrangement and conservation during chemical reactions or the application of these ideas to biological systems. To help provide students with a better…
Descriptors: Biology, Secondary School Science, Middle School Students, High Schools
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Jaber, Lama Ziad; Boujaoude, Saouma – International Journal of Science Education, 2012
The purpose of this research is threefold: (1) to identify the difficulties that Grade 10 students in a Lebanese school have that hinder their conceptual understanding at the micro-macro-symbolic interface in chemistry, (2) to investigate the effect of a macro-micro-symbolic teaching approach on students' relational understanding of chemical…
Descriptors: Concept Formation, Chemistry, Teaching Methods, Experimental Groups
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Fazio, Claudio; Battaglia, Onofrio R.; Guastella, Ivan – European Journal of Physics, 2012
In this paper we discuss a pedagogical approach aimed at pointing out the role played by the Boltzmann factor in describing phenomena usually perceived as regulated by different mechanisms of functioning. Experimental results regarding some aspects of a chemical reaction and of the viscous flow of some liquids are analysed and described in terms…
Descriptors: Chemistry, Science Instruction, Physics, Science Experiments
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Vié, Clotilde; Fattaccioli, Jacques; Jacq, Philippe – Journal of Chemical Education, 2019
This activity introduces droplet-based millifluidics and the usage of aqueous droplets as independent chemical microreactors for reaction-kinetics studies. Students build their own droplet generators from common macroscopic glassware and connecting parts to create trains of millimeter-sized droplets in which a redox reaction takes place. The…
Descriptors: Chemistry, Kinetics, Undergraduate Students, College Science
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Chen, Fu; Zhang, Shanshan; Guo, Yanfang; Xin, Tao – Research in Science Education, 2017
We used the Rule Space Model, a cognitive diagnostic model, to measure the learning progression for thermochemistry for senior high school students. We extracted five attributes and proposed their hierarchical relationships to model the construct of thermochemistry at four levels using a hypothesized learning progression. For this study, we…
Descriptors: Chemistry, High School Students, Secondary School Science, Correlation
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Chen, Kai; Zhou, Jingming; Lin, Jiayi; Yang, Jing; Xiang, Jiamin; Ling, Yizhou – Journal of Chemical Education, 2021
The topic of chemistry safety was included at the margins of traditional chemistry education in China. In order to understand the concerns of the safety issues based on the new chemistry curriculum in the mainland China secondary school, this study analyzed old and new secondary chemistry curriculum standards via the Natural Language Processing…
Descriptors: Science Instruction, Chemistry, Science Laboratories, Laboratory Safety
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Meek, Simon J.; Pitman, Catherine L.; Miller, Alexander J. M. – Journal of Chemical Education, 2016
An introductory guide to deducing the mechanism of chemical reactions is presented. Following a typical workflow for probing reaction mechanism, the guide introduces a wide range of kinetic and mechanistic tools. In addition to serving as a broad introduction to mechanistic analysis for students and researchers, the guide has also been used by…
Descriptors: Science Instruction, College Science, Chemistry, Scientific Concepts
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