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Showing 1 to 15 of 21 results Save | Export
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Hugo Y. Samayoa-Oviedo; Samantha A. Mehnert; Michael F. Espenship; Miranda R. Weigand; Julia Laskin – Journal of Chemical Education, 2023
In both general chemistry and analytical chemistry courses, students are introduced to the concept of predominant species in solution when discussing acid/base chemistry. Speciation diagrams are often used to illustrate the concept and predict the relative abundance of species in solution. Herein, we describe a laboratory experiment for an…
Descriptors: Chemistry, Spectroscopy, Measurement, Visual Aids
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Arlene A. Russell; Jennifer R. Casey; Kristopher K. Barr – Journal of Chemical Education, 2023
We report here a successful adaptation of lab videos used during remote instruction to a kinetics experiment reported in this Journal in 2007. In the in-person lab, students now record their rate data on their cell phone cameras and then collect their data from the videos for their postlab reports; previously, they acquired the data in real time…
Descriptors: Chemistry, College Freshmen, College Science, Laboratory Experiments
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Mark F. Vitha – Journal of Chemical Education, 2022
This Article comes from a series of 2 h instrumental analysis laboratory experiments developed in response to social distancing requirements established because of the coronavirus pandemic (COVID). The experiments provided rich data-analysis opportunities that taught students the chemical principles that underpin instrumental techniques, yet made…
Descriptors: Chemistry, Science Education, Laboratory Experiments, Data Collection
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Bhavik Anil Patel – Journal of Chemical Education, 2022
Accuracy and precision are measures of experimental error and are fundamental to most chemical analysis laboratory classes. Assessment of accuracy and precision is often based on the comprehension of the results generated by students rather than on the quality of the data generated. This activity focused on developing a chemical analysis…
Descriptors: Chemistry, Science Laboratories, Accuracy, Data
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Carla Morais; Jose´ L. Arau´jo – Journal of Chemical Education, 2023
In the laboratory, data acquisition systems are important, as they allow us to easily and precisely collect data. In this sense, Arduino emerges as an automatic data acquisition device with great potential, due to its low cost and high versatility. In this work, we describe the development of an experimental apparatus, with automatic data…
Descriptors: Chemistry, Science Instruction, Preservice Teachers, Science Teachers
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Adrian Adams; Lauren Barth-Cohen – CBE - Life Sciences Education, 2024
In undergraduate research settings, students are likely to encounter anomalous data, that is, data that do not meet their expectations. Most of the research that directly or indirectly captures the role of anomalous data in research settings uses post-hoc reflective interviews or surveys. These data collection approaches focus on recall of past…
Descriptors: Undergraduate Students, Physics, Science Instruction, Laboratory Experiments
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Gallitto, Aurelio Agliolo; Battaglia, Onofrio Rosario; Fazio, Claudio – Physics Education, 2021
We describe an educational activity that can be done by using smartphones to collect data in physics experiments aimed to measure the oscillating period of a spring-mass system and the elastic constant of the helicoidal spring by the dynamic method. Results for the oscillating period and for the elastic constant of the spring agree very well with…
Descriptors: Science Instruction, Physics, Measurement Techniques, Telecommunications
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Knutson, Cassandra M.; Hilker, Abby P.; Tolstyka, Zachary P.; Anderson, Constance B.; Wilbon, Perry A.; Mathers, Robert T.; Wentzel, Michael T.; Perkins, Angela L.; Wissinger, Jane E. – Journal of Chemical Education, 2019
A versatile experiment is described for the high school and college laboratory setting based on the synthesis of biobased polymers prepared from inexpensive, renewable, and nonhazardous chemicals. Combinations of readily available citric acid, glycerol, and tapioca root starch are used to prepare three polymeric materials with different observable…
Descriptors: Secondary School Science, College Science, Chemistry, Science Experiments
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Patel, Parth H.; Conrad, Kristofer L.; Pathiranage, Anuradha L.; Hiatt, Leslie A. – Journal of Chemical Education, 2020
Given student familiarity with electronic cigarettes (e-cigs), this lab uses a student-built smoke collection apparatus to collect e-cig vapors to teach students about gas chromatography-mass spectrometry (GC-MS). Students in a second semester, introductory organic chemistry course spent 1 week collecting e-cig vapors and 1 week qualitatively…
Descriptors: Organic Chemistry, Smoking, Electronic Equipment, Science Experiments
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Mikhailova, Elena A.; Post, Christopher J.; Zurqani, Hamdi A.; Younts, Grayson L. – Education Sciences, 2022
Crowdsourcing is an important tool for collecting spatio-temporal data, which has various applications in education. The objectives of this study were to develop and test a laboratory exercise on soil erosion by water and field data crowdsourcing in an online introductory soil science course (FNR 2040: Soil Information Systems) at Clemson…
Descriptors: Social Sciences, Telecommunications, Handheld Devices, Geographic Information Systems
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Wong, Wing-Kwong; Chen, Kai-Ping; Lin, Jia-Wei – International Journal of Distance Education Technologies, 2020
The results of PISA 2015 indicate that Taiwanese students have excellent mathematical and scientific knowledge but are weak in applying such knowledge and in conducting practical experiments in the laboratory. To support students conducting practical experiments in physics laboratories, a real-time data logging system and an online tool for…
Descriptors: Foreign Countries, Physics, Science Instruction, Handheld Devices
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Guerra, Nelson Pérez – Journal of Chemical Education, 2017
A laboratory experiment in which students study the kinetics of the Viscozyme-L-catalyzed hydrolysis of cellulose and starch comparatively was designed for an upper-division biochemistry laboratory. The main objective of this experiment was to provide an opportunity to perform enhanced enzyme kinetics data analysis using appropriate informatics…
Descriptors: Undergraduate Study, Biochemistry, Kinetics, Laboratory Experiments
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Kim, Myung-Hoon; Kim, Michelle S. – Journal of Chemical Education, 2016
A visual regression analysis using the least absolutes method (LAB) was developed, utilizing an interactive approach of visually minimizing the sum of the absolute deviations (SAB) using a bar graph in Excel; the results agree very well with those obtained from nonvisual LAB using a numerical Solver in Excel. These LAB results were compared with…
Descriptors: Least Squares Statistics, Regression (Statistics), Graphs, Courseware
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Sweeney, William; Lee, James; Abid, Nauman; DeMeo, Stephen – Journal of Chemical Education, 2014
An experiment is described that determines the activation energy (E[subscript a]) of the iodide-catalyzed decomposition reaction of hydrogen peroxide in a much more efficient manner than previously reported in the literature. Hydrogen peroxide, spontaneously or with a catalyst, decomposes to oxygen and water. Because the decomposition reaction is…
Descriptors: Science Instruction, Science Experiments, Energy, Scientific Principles
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Gal, Ya'akov; Uzan, Oriel; Belford, Robert; Karabinos, Michael; Yaron, David – Journal of Chemical Education, 2015
A process for analyzing log files collected from open-ended learning environments is developed and tested on a virtual lab problem involving reaction stoichiometry. The process utilizes a set of visualization tools that, by grouping student actions in a hierarchical manner, helps experts make sense of the linear list of student actions recorded in…
Descriptors: Virtual Classrooms, Laboratory Experiments, Online Courses, Electronic Learning
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