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ERIC Number: EJ939007
Record Type: Journal
Publication Date: 2011-Jul
Pages: 4
Abstractor: As Provided
Reference Count: 14
ISBN: N/A
ISSN: ISSN-0021-9584
Quantitative Analysis in the General Chemistry Laboratory: Training Students to Analyze Individual Results in the Context of Collective Data
Ling, Chris D.; Bridgeman, Adam J.
Journal of Chemical Education, v88 n7 p979-982 Jul 2011
Titration experiments are ideal for generating large data sets for use in quantitative-analysis activities that are meaningful and transparent to general chemistry students. We report the successful implementation of a sophisticated quantitative exercise in which the students identify a series of unknown acids by determining their molar masses following a simple standardization exercise. The activity involves the collection and analysis of data from the entire class using standard spreadsheet software. Students deal with outliers, plot the results as a frequency histogram, and fit these histograms to normal distributions using least-squares minimization algorithms. The data-analysis skills and appreciation that are developed through the addition of this activity to a standard titration experiment can then be developed in more complex upper-level experiments for science majors. (Contains 1 table and 4 figures.)
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; Postsecondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A