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Journal of Chemical Education172
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Showing 16 to 30 of 172 results Save | Export
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McArdle, Patrick – Journal of Chemical Education, 2019
This article contrasts the normal method for drawing Lewis structures with a two-step systematic approach. The latter approach uses a known molecular connectivity and a knowledge of the number of valence electrons that each atom possesses to visualize bonds that are formed by pairing electrons, one from each atom. This process is repeated until at…
Descriptors: Chemistry, Science Instruction, Computer Assisted Instruction, Freehand Drawing
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Murshid, Nimer; Cathcart, Nicole; Kitaev, Vladimir – Journal of Chemical Education, 2019
Teaching emulsion polymerization is an important benchmark in undergraduate polymer courses. However, the introduction of hands-on experiments in undergraduate polymer laboratories is challenging: experimental time, reagents, and equipment involved are the primary restraints. We report a practical emulsion polymerization laboratory experiment for…
Descriptors: Science Instruction, College Science, Undergraduate Students, Science Laboratories
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Cruzeiro, Vinícius Wilian D.; Gao, Xiang; Kleiman, Valeria D. – Journal of Chemical Education, 2019
The ready availability of interactive platforms has produced a new generation of students able to utilize computer-based learning tools with ease and comfort. The potential to better "explore by yourself" the lecture material permits students to have an enhanced learning experience and stimulates them to tinker with equation parameters…
Descriptors: Science Instruction, Quantum Mechanics, Chemistry, College Science
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Mutambuki, Jacinta M.; Fynewever, Herb; Douglass, Kevin; Cobern, William W.; Obare, Sherine O. – Journal of Chemical Education, 2019
Integrating authentic research-based experiences that mimic real-world scientific practices and relevance to student personal life into a chemistry curriculum can make abstract chemical principles more palpable to students. Unfortunately, many reported research-based experiences chemistry laboratory experiments lack relevance to a student's…
Descriptors: Science Instruction, STEM Education, Student Research, Science Laboratories
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Yong, Fang; Zhu, Qiuhong; Zhang, Guohao; Tao, Guohong; Qin, Song – Journal of Chemical Education, 2019
The stated purpose of this paper is to provide a simple and quick method to assemble pH electrodes using readily available materials. The present assembled electrodes are comparable with commercial pH electrodes, with accuracy for pH determination in the range 2-12. Furthermore, the constructed simple pH electrodes exhibit a fast and stable…
Descriptors: Science Instruction, Chemistry, Teaching Methods, Science Laboratories
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Minkiewicz, Piotr; Darewicz, Malgorzata; Iwaniak, Anna – Journal of Chemical Education, 2018
A simple equation to calculate the oxidation states (oxidation numbers) of individual atoms in molecules and ions may be introduced instead of rules associated with words alone. The equation includes two of three categories of bonds, classified as proposed by Goodstein: number of bonds with more electronegative atoms and number of bonds with less…
Descriptors: Science Instruction, Secondary School Science, High Schools, College Science
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Boyd-Kimball, Debra; Miller, Keith R. – Journal of Chemical Education, 2018
Laboratory courses are often designed using step-by-step protocols which encourage students to conduct experiments without thinking about what they are doing or why they are doing it. Such course design limits the growth of our students as scientists and can make it more difficult for a student to transition to the expectations of a research…
Descriptors: Science Laboratories, Science Instruction, College Science, Undergraduate Study
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Schroeder, Lianne; Bierdz, Joshua; Wink, Donald J.; King, Maripat; Daubenmire, Patrick L.; Clark, Ginevra A. – Journal of Chemical Education, 2018
We implemented a laboratory curriculum reform to teach foundational concepts in chemistry, particularly those concepts related to healthcare, in a chemistry course for prenursing students. Here, we discuss the reform, exploring how students built upon understandings gained in lab and correlating lab learning to course outcomes. We further discuss…
Descriptors: Science Instruction, Chemistry, Undergraduate Study, College Science
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Mercier, Philippe H. – Journal of Chemical Education, 2018
Le Châtelier's principle is used as a basis to derive an expression to calculate solution pH during titrations that involve only strong acids and strong bases. Central to this model are the reaction quotient and a re-equilibration term that represents the extent of neutralization during a titration. Unlike the method traditionally taught to…
Descriptors: Science Instruction, Scientific Principles, College Science, Undergraduate Study
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Kumasaki, Mieko; Shoji, Takuro; Wu, Tsung-Chih; Soontarapa, Khantong; Arai, Mitsuru; Mizutani, Takaaki; Okada, Ken; Shimizu, Yoshitada; Sugano, Yasuhiro – Journal of Chemical Education, 2018
"Manga" are graphic novels that are considered to have the potential to effectively convey concepts and engage readers. The efficacy of "manga" has been validated for chemical safety education to students in three universities in Japan, Taiwan, and Thailand. Students were asked to examine a photo to identify hazards and…
Descriptors: Foreign Countries, Science Instruction, Teaching Methods, College Science
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Koh, Sam Boon Kiat; Fung, Fun Man – Journal of Chemical Education, 2018
A mobile application game has been adapted to teach students about laboratory instruments, glassware, apparatus, and techniques. The game was designed with reference to a popular icebreaker game, "Charades!", to ensure that it was easily accessible to students. Students will hold a mobile phone just above their forehead, which will then…
Descriptors: Science Instruction, Science Laboratories, Laboratory Equipment, Telecommunications
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Jones, Oliver A. H.; Spichkova, Maria; Spencer, Michelle J. S. – Journal of Chemical Education, 2018
Mobile technology is increasingly prevalent in higher education. Chemistry-related software applications (apps) on touchscreen computers are emerging as a popular platform in many areas, including in the chemistry classroom. In this work, a new game-based app designed for hand-held and portable touch-controlled devices is presented. Chirality-2…
Descriptors: Telecommunications, Handheld Devices, Chemistry, Science Instruction
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Messerle, Louis – Journal of Chemical Education, 2018
iSchlenk, a portable instructional cart with equipment for hands-on student experience in safe handling of air-sensitive, moisture-sensitive, toxic, pyrophoric, and/or radioactive chemical materials, is described. The cart, for use by =4 students, has compressed air and vacuum from a diaphragm vacuum pump supplied to 4 three-port Schlenk lines…
Descriptors: Science Equipment, Teaching Methods, Hands on Science, Student Experience
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Harakas, George N. – Journal of Chemical Education, 2018
This work describes an effective, low cost method to anodize small aluminum objects. The use of a PVC spacer between the anode and cathode significantly reduces the size of the electrochemical cell and electrolyte required for its operation. Students will explore the physical and chemical properties of aluminum and anodized aluminum. They will…
Descriptors: Chemistry, Metallurgy, Cost Effectiveness, Molecular Structure
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Newman, Karla – Journal of Chemical Education, 2018
Almost all commercial quadrupole ICP-MS instruments use collision/reaction cells to either attenuate spectral interferences or shift the analyte of interest to an interference-free "m/z" (e.g., by O addition). A laboratory practical was developed to introduce the students to the basic operating principles of ICP-MS using a hands-on…
Descriptors: Molecular Structure, Spectroscopy, College Science, Laboratory Experiments
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