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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
Mariela Analía Torres; Alejandra Leonor Valdez; Carolina de Lourdes Olea; María Fernanda Figueroa; Carlos Gabriel Nieto-Peñalver – Biochemistry and Molecular Biology Education, 2024
After a time away from the classrooms and laboratories due to the global pandemic, the return to teaching activities during the semester represented a challenge to both teachers and students. Our particular situation in a Microbial Physiology course was the necessity of imparting in shorter time, laboratory practices that usually take longer. This…
Descriptors: Science Instruction, Science Laboratories, Physiology, Microbiology
Patricia Prodan; Matteo Neffat; Renato Bonomi – Journal of Chemical Education, 2024
The activity proposed in this study aims to investigate the equilibrium between the liquid and vapor phases in a mixture of water and acetic acid, both of which are volatile substances. High school students can easily determine the composition of the liquid phase and its corresponding vapor phase at equilibrium using a simple and conceptually…
Descriptors: Chemistry, Science Instruction, Learning Activities, High School Students
Shuang Qiu; Dongyang Zhang; Vishal Yeddu; Cristina Cordoba; Arthur M. Blackburn; Violeta Iosub; Makhsud I. Saidaminov – Journal of Chemical Education, 2023
When structure-property relationships are discussed in inorganic chemistry and materials science, the common perception is that materials with the same composition and atomic arrangement have the same properties. In this laboratory experiment, we show that "processing"--the exact conditions under which materials are made--can in fact…
Descriptors: Synthesis, Inorganic Chemistry, Scientific Concepts, Molecular Structure
Daniele Crisafulli; Giulia Savoca; Francesca Mancuso; Martina Mazzaferro; Marco Milone; Ilenia Pisagatti; Anna Notti; Melchiorre F. Parisi; Giuseppe Gattuso – Journal of Chemical Education, 2024
In this two-session experiment for an organic chemistry lab, students prepare a macrocyclic host compound--namely, a pillar[5]arene--by means of a templated 1,4-dimethoxybenzene/formaldehyde cyclo-oligomerization (session 1), and then, they explore its molecular recognition properties toward the 1,8-diaminooctane guest with the aid of [superscript…
Descriptors: Scientific Concepts, Organic Chemistry, Science Experiments, Laboratory Experiments
S. Ephraim Neumann; Kallie Neumann; Zhiling Zheng; Nikita Hanikel; Jonathan Tsao; Omar M. Yaghi – Journal of Chemical Education, 2023
Educational content is consistently adapted to enhance the learning experience of students at all experience and skill levels. Student motivation and accessibility are key factors in teaching science to a broad audience. The presented experiments engage the students by relating the content to that which is immediately relevant to them: the threat…
Descriptors: Water, Student Interests, Science Education, Laboratory Experiments
Mahaveer Genwa; Jyoti Singh; Alka Rani; Kushagra Yadav; Chetna Angrish – Journal of Chemical Education, 2024
Photochemical reactions are initiated by the absorption of light, triggering the chemical reactions and resulting in the formation of products. These reactions are generally performed using a freely available renewable source of energy-solar energy. Solar simulators mimic both the ultraviolet and visible regions of sunlight and hence can serve as…
Descriptors: Chemistry, Science Instruction, Undergraduate Study, Science Laboratories
Midori Tanaka; Toshimichi Shibue – Journal of Chemical Education, 2023
High-resolution mass spectrometry (HRMS) is an analytical technique that is typically used by mass spectrometry experts. However, with recent advancements, it is becoming more accessible to students in organic chemistry laboratories. Still, a significant knowledge gap exists between these experts and students. A straightforward laboratory…
Descriptors: Organic Chemistry, Spectroscopy, Laboratory Experiments, Scientific Research
Si-Ke Chen; Xiao-Jie Ju; Jie Wei; Wei Wang; Liang-Yin Chu – Journal of Chemical Education, 2023
Previous educational articles on microfluidic technology mainly focused on continuous microfluidics, so we set up an undergraduate laboratory experiment to introduce droplet microfluidics to students. Students can understand the concept of microfluidic channels and the principles of droplet microfluidics, prepare polydimethylsiloxane (PDMS)…
Descriptors: Chemistry, Scientific Concepts, Science Experiments, Science Materials
Adrian R. Hilts; Jason Cooke – Journal of Chemical Education, 2023
The addition of a small excess of triethyl orthoformate to an alcoholic mixture of NiCl[subscript 2]·6H[subscript 2]O and triphenylphosphine (PPh[subscript 3]) results in an increase in the typical isolated yield of [NiCl[subscript 2](PPh[subscript 3])[subscript 2]] from below 50% to over 85%. The impact of water when present in the reaction…
Descriptors: College Science, Chemistry, Undergraduate Study, Scientific Concepts
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
Y. Justin Lim; Brandon Wong; Katie Macfee; Alexa Cueva; E. Aaron Martinez; Cameron Paxton; Robin Barnes; Eric Kleinsasser; Travis J. Williams – Journal of Chemical Education, 2024
Most students enter college without any exposure to polymer science, which leads to the poor understanding and slow implementation of plastic recycling programs in the United States. To address the knowledge gap in chemical recycling, we introduce a 2-part laboratory experiment that was conducted in multiple high schools and public outreach events…
Descriptors: Secondary School Science, Science Experiments, Chemistry, Recycling
Palacios Gómez, Jesús; Villagómez, Roque André Eleazar Arroyo – Physics Teacher, 2023
Here, a relatively simple laboratory experiment of a physical pendulum, suitable for students of science and engineering in the first courses of university physics, is presented to illustrate its dynamic behavior and to determine its inertia moment. To this end, a long wooden rod of length L = 99.8 cm and cross-section radius R = 1.73 cm was used…
Descriptors: Physics, Science Instruction, Science Laboratories, Motion
Rameez Raza; Connor Pattison; Wen Zhou; Lucas Clarke; Devin Latimer; Nabyl Merbouh – Journal of Chemical Education, 2023
While elimination reactions are ubiquitous in organic chemistry textbooks, their implementation in undergraduate laboratories still suffers from a lack of reliable and easy setup procedures. This paper describes an easy-to-implement set of elimination experiments in the pentanol and bromopentane series using a modified Hickman distillation head.…
Descriptors: Organic Chemistry, Undergraduate Study, College Science, Science Laboratories
Shun Iwasaki; Satoki Kodani; Yuto Zushi; Mito Hotta; Masami Hara; Tomoyuki Tatsuoka; Nobuyoshi Koga – Journal of Chemical Education, 2023
In this laboratory experiment, a guided inquiry exploring the physicochemical principles of the dissolution of Ca(OH)[subscript 2](s) in water is proposed for laboratory classes in university and high school. As part of students' inquiry, two experimental approaches are used. One is the change in solubility with temperature revealed by measuring…
Descriptors: College Science, Secondary School Science, Science Education, Science Laboratories