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Mauna S. Kareti; William J. Howitz – Journal of Chemical Education, 2023
Normal phase thin layer chromatography is a widely taught technique in undergraduate organic chemistry laboratory courses. To understand how the technique works, students must have a strong conceptual understanding of polarity and intermolecular forces. Unfortunately, many students have misconceptions regarding how polarity and intermolecular…
Descriptors: College Science, Organic Chemistry, Scientific Concepts, Misconceptions
Juan M. Sanchez – Journal of Chemical Education, 2023
Descriptive statistics involves summarizing and organizing data so that they can be easily understood. Even though these are basic and simple concepts, many applied science students have misconceptions about their use in applied experiments in the laboratory. Students usually receive limited or no training in how to understand the meaning of the…
Descriptors: College Science, Chemistry, Undergraduate Students, Scientific Attitudes
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Rowe, Laura; Kubalewski, Maria; Clark, Robert; Statza, Emily; Goyne, Thomas; Leach, Katie; Peller, Julie – Journal of Chemical Education, 2019
Environmental pollution is both a worldwide and a local issue, and microplastic pollution in particular is receiving increased attention due to its prevalence and bioaccumulation potential affecting the food chain. This laboratory experiment uses current, research-based methods such that the students can determine the extent of microplastic…
Descriptors: Plastics, Undergraduate Students, Chemistry, Laboratory Experiments
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Perez-Benito, Joaquin F. – Journal of Chemical Education, 2017
The elementary reaction sequence A ? I ? Products is the simplest mechanism for which the steady-state and quasi-equilibrium kinetic approximations can be applied. The exact integrated solutions for this chemical system allow inferring the conditions that must fulfill the rate constants for the different approximations to hold. A graphical…
Descriptors: Chemistry, Kinetics, Scientific Concepts, Graduate Study
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Best, Katherine T.; Li, Diana; Helms, Eric D. – Journal of Chemical Education, 2017
The electrophilic addition of a hydrohalic acid (HX) to an alkene is often one of the first reactions learned in second-year undergraduate organic chemistry classes. During the ensuing discussion of the mechanism, it is shown that this reaction follows Markovnikov's rule, which states that the hydrogen atom will attach to the carbon with fewer…
Descriptors: Organic Chemistry, Undergraduate Study, Science Instruction, College Science
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Yoshikawa, Masahiro; Koga, Nobuyoshi – Journal of Chemical Education, 2016
This study focuses on students' understandings of a liquid-gas system with liquid-vapor equilibrium in a closed system using a pressure-temperature ("P-T") diagram. By administrating three assessment questions concerning the "P-T" diagrams of liquid-gas systems to students at the beginning of undergraduate general chemistry…
Descriptors: Science Instruction, Scientific Concepts, Concept Formation, College Science
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Coleman, Aaron B.; Lam, Diane P.; Soowal, Lara N. – Biochemistry and Molecular Biology Education, 2015
Gaining an understanding of how science works is central to an undergraduate education in biology and biochemistry. The reasoning required to design or interpret experiments that ask specific questions does not come naturally, and is an essential part of the science process skills that must be learned for an understanding of how scientists conduct…
Descriptors: Science Instruction, College Science, Undergraduate Study, Biochemistry
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Kennon, James Tillman; Fong, Bryant; Grippo, Anne – Science Activities: Classroom Projects and Curriculum Ideas, 2016
Sunscreens have different levels of protection, measured most commonly with the sun protection factor (SPF). Students initially believed higher SPF factors mean greater sun protection and learned through this activity that higher SPF does not mean greater protection. Students analyzed the amount of ultraviolet radiation (UVR) protection and…
Descriptors: High School Students, College Students, Secondary School Science, College Science
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Del Bianco, Cristina; Torino, Domenica; Mansy, Sheref S. – Journal of Chemical Education, 2014
A laboratory exercise is described that helps students learn about lipid self-assembly by making vesicles under different solution conditions. Concepts covering the chemical properties of different lipids, the dynamics of lipids, and vesicle stability are explored. Further, the described protocol is easy and cheap to implement. One to two…
Descriptors: Science Instruction, Science Laboratories, Biochemistry, Undergraduate Study
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Guzman, Karen; Bartlett, John – Biochemistry and Molecular Biology Education, 2012
Biological systems and living processes involve a complex interplay of biochemicals and macromolecular structures that can be challenging for undergraduate students to comprehend and, thus, misconceptions abound. Protein synthesis, or translation, is an example of a biological process for which students often hold many misconceptions. This article…
Descriptors: Biology, Misconceptions, Undergraduate Students, Laboratory Experiments
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Mekelburg, Christopher R.; Szczepankiewicz, Steven H.; Hellerer, Matthew – Journal of Chemical Education, 2010
This case study places the high school student as a researcher for Carbonation Creators (fictional entity), a company responsible for making the Fizzy Forcer (a device to improve carbonation in previously opened bottles of soft drinks). The company faces a class-action lawsuit claiming that the Fizzy Forcer does not retain carbonation levels in…
Descriptors: High School Students, Secondary School Science, College Science, Case Studies
Bromfield Lee, Deborah Christina – ProQuest LLC, 2009
"Visualization" of chemical phenomena often has been limited in the teaching laboratories to the sense of sight. We have developed chemistry experiments that rely on senses other than eyesight to investigate chemical concepts, make quantitative determinations, and familiarize students with chemical techniques traditionally designed using only…
Descriptors: College Science, Chemistry, Science Instruction, Science Experiments