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ERIC Number: EJ1159467
Record Type: Journal
Publication Date: 2017-Oct
Pages: 5
Abstractor: As Provided
ISBN: N/A
ISSN: ISSN-0021-9584
EISSN: N/A
Hydration of Decorative Beads: An Exercise in Measurement, Calculations, and Graphical Analysis
Hill, Rebecca A.; Nicholson, Christopher P.
Journal of Chemical Education, v94 n10 p1517-1521 Oct 2017
Throughout the general chemistry lab curriculum, a common shortcoming is the way in which students measure, record, and manipulate quantitative data. From initial measurements with different digital and analog instruments to proper conversions, calculations, and comparisons, students are often expected to be experts before they have been taught proper technique and scientific principles. While the start of any General Chemistry 1 course involves a period of familiarization with the scientific method, significant figures, and elements of atomic structure, these often do not correlate well with laboratory experimentation. We have developed an experiment to be conducted during the first weeks of a general chemistry lab that emphasizes measurement techniques, accuracy, average value calculations, and uncertainty of measurement calculations. The experiment is designed such that time versus mass change measurements are taken and used in an introduction to graphical analysis. This allows for the experiment to be done in a short period of time while also affording student-generated data for teaching spreadsheet use, data processing, and linear regression. Instructor feedback and student survey data following this experiment indicate significant improvement in students' abilities to collect and properly analyze data.
Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Florida
Grant or Contract Numbers: N/A