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Wheate, Nial J.; Apps, Michael G.; Khalifa, Hazer; Doughty, Alan; Patel, Alpesh Ramanlal – Journal of Chemical Education, 2017
A laboratory experiment to determine the concentration of the anti-inflammatory drug ibuprofen in liquid gelatin capsule dosage forms, suitable for undergraduate chemistry or pharmacy students, is described. Either individually, or in small teams, the students digest two 200 mg capsules in a KOH solution. While the capsules are digesting the…
Descriptors: Science Instruction, Science Laboratories, Laboratory Experiments, Science 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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Richardson, W. S.; Teggins, J. E. – Journal of Chemical Education, 1988
Provides a first experiment for college chemistry that provides insights into scientific procedures without presupposing any detailed knowledge of chemistry on the part of the student. Requires the student to measure successive masses and volumes and use these values to determine the density from the slope of the graph. (MVL)
Descriptors: Chemical Analysis, Chemistry, College Science, Density (Matter)