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Michael J. Jenkins; Miranda A. Phillips; Zi-Ling Xue – Journal of Chemical Education, 2023
This experiment demonstrates that copper(II) chloride dihydrate (CuCl[subscript 2]·2H[subscript 2]O) in different solvents (acetone, isopropyl alcohol, or water) displays divergent colors and visible-near IR spectra. Both the reactions of these solutions with 2 equiv of sodium hydroxide (NaOH) and the direct solid-state reaction of CuCl[subscript…
Descriptors: Science Experiments, Laboratory Experiments, Scientific Concepts, College Science
Blagotinšek, Ana Gostincar – Physics Teacher, 2023
Two misconceptions about the mechanism of image formation in the human eye are common among students and even in textbooks and other teaching materials. The first attributes all refraction to the eye lens; the second treats the eye as a pinhole camera. To reduce these persistent conceptions of students, a series of simple experiments is presented…
Descriptors: Vision, Science Instruction, Instructional Materials, Laboratory Experiments
Yu Liu; Alec S. Lininger; Lauren N. McCaskey; Rachel M. Thomas – Journal of Chemical Education, 2023
A new organic chemistry experiment aimed to separate the chlorophyll precursor in plant seeds by column chromatography is described. The primary pedagogical goal in developing this experiment is to establish a simple and interesting chromatographic separation to demonstrate basic concepts and the standard procedure for this important lab…
Descriptors: Organic Chemistry, Color, Plants (Botany), Science Experiments
Garci´a-Ponce, A´ngel Luis; Torres-Vargas, Jose´ Antonio; Garci´a-Caballero, Melissa; Medina, Miguel A´ngel; Blanco-Lo´pez, A´ngel; Quesada, Ana R. – Journal of Chemical Education, 2021
Although many laboratory experiments are available to illustrate spectrophotometric or fluorometric methods, few of them introduce the use of luminometry to students. Bioluminescence, a subtype of chemiluminescence, is produced when an enzyme-catalyzed chemical reaction gives rise to light emission. Despite the advantages of bioluminescent…
Descriptors: Undergraduate Students, Laboratory Experiments, College Science, Biochemistry
Mary Sever; Mark A. Young – Journal of Chemical Education, 2023
A laboratory experiment that exposes students to fundamental concepts in kinetics and statistical thermodynamics to study systems of great current interest in nanotechnology by employing a foundational technique in physical chemistry is described. A modified commercial flash photolysis spectrometer was used to study photoinduced isomerization…
Descriptors: Laboratory Experiments, Scientific Concepts, Thermodynamics, Science Education
Tianruo Shen; Davin Tan; Jia Fang Rachel Lee; Eng Ying Bong; Xiaogang Liu – Journal of Chemical Education, 2023
Knowledge related to photochemistry has been gradually introduced as a part of chemistry courses at both undergraduate and postgraduate levels. However, due to their complex conceptual principles, limited class time, and tedious experimental setup and methodologies, students tend to encounter difficulties in understanding the concepts and…
Descriptors: Food, Teaching Methods, Chemistry, Science Instruction
Zollman, Dean; Bearden, Ian – Physics Education, 2020
Light emitting diodes have been used to determine Planck's constant in introductory physics laboratories. One common method relies on the energy of the light emitted by the LED and its relation to the energy gap in the solid of which the diode is composed. However, there could be a problem with the data that are collected for this experiment. For…
Descriptors: Light, Science Instruction, Physics, Science Laboratories
Yimkosol, Warangkana; Dangkulwanich, Manchuta – Journal of Chemical Education, 2021
Colorful transitions of various acid-base indicators have been used to illustrate the concept of chemical equilibria, especially in spectrophotometric determination of the equilibrium constants or pKa values. To accommodate an online laboratory environment necessitated by the COVID-19 pandemic, this work employs color analyses from digital images…
Descriptors: Chemistry, Science Instruction, Teaching Methods, Laboratory Experiments
Hachmi, Ali; El Hadi, Mohammed; Essaadaoui, Rachid; Mommadi, Omar; Ouariach, Abdelaziz; El Moussaouy, Abdelaziz – Physics Education, 2022
The Arduino board and its communication with several sensors are becoming more and more popular in the physical science community. They offer inspiring possibilities for learning different physical concepts. In this article, we focused on creating a very practical educational system for experimenting with diffraction of laser light and graphically…
Descriptors: Electronic Equipment, Physics, Science Instruction, Teaching Methods
Salinas, Isabel; Giménez, Marcos H.; Monsoriu, Juan A.; Castro-Palacio, Juan C. – Physics Teacher, 2018
The smartphone's ambient light sensor has been used in the literature to study different physical phenomena. For instance, Malus's law, which involves the polarized light, has been verified by using simultaneously the orientation and light sensors of a smartphone. The illuminance of point light sources has been characterized also using the light…
Descriptors: Physics, Handheld Devices, Light, Measurement
Changenet, Pascale; Gustavsson, Thomas; Lampre, Isabelle – Journal of Chemical Education, 2020
In order to introduce students to the fascinating field of femtochemistry, we propose here a practical laboratory training course conceived for second-year master's students in chemistry. We describe the use of a broadband femtosecond transient absorption (pump-probe) experiment for monitoring a fast light-triggered chemical reaction in solution.…
Descriptors: Chemistry, Science Instruction, Spectroscopy, Scientific Concepts
Rubenstein, Dana; Patterson, William; Peng, Iris; Schunk, Francisco; Mendoza-Garcia, Adriana; Lyu, Mengjie; Wang, Li-Qiong – Journal of Chemical Education, 2020
Laboratory experiments provide students a tangible means of understanding dry, abstract concepts. A simple and engaging introductory wet chemistry laboratory has been developed relating quantum mechanics to color, which has been implemented for a class of about 600 students per academic year for over three years at Brown University. Color is an…
Descriptors: Science Instruction, Science Laboratories, Quantum Mechanics, Laboratory Experiments
Rosi, Tommaso; Gratton, Luigi M.; Onorato, Pasquale; Oss, Stefano – Physics Education, 2019
We propose to reconsider the well-known experiment about the interference of white light from a thin soap film by adopting as an illuminating source the RGB triad produced by a LED projector. The interference pattern shows up in a particularly fascinating way and it contains direct, essential information about both the wave nature of light and of…
Descriptors: Science Instruction, Science Experiments, Light, Scientific Concepts
Singh, I.; Khun Khun, K.; Kaur, B. – Physics Education, 2018
Excel spreadsheets are used as an excellent tool in physics laboratory experiments related to wave optics. This paper presents a simple way to simulate diffraction of waves through a slit using Excel spreadsheets without any tedious programming. These simulations are used to visualize the effect of variation of different parameters such as number…
Descriptors: Physics, Science Education, Spreadsheets, Computer Software
Aguilar, Horacio Munguía; Maldonado, Rigoberto Franco; Navarro, Luis Barba – Physics Education, 2018
In hydrostatics, pressure measurement with U-gauges and their relationship to density is a well-known experiment. Very little is studied or experimented with the dynamics of the movement of a liquid in a U-tube probably due to its theoretical complexity but, after all, it is a simple damped oscillating system. In this paper we present a relatively…
Descriptors: Science Instruction, Physics, Science Experiments, Laboratory Experiments