The Chemical Educator
ISSN: 1430-4171 (electronic version)
Abstract Volume 12
Issue 5 (2007) pp 353-369
Comparisons of Quantitative Methods Through Analyses of TUMS
Houston Byrd* and Cynthia P. Tidwell*
Department of Biology, Chemistry & Mathematics,
University of Montevallo, Montevallo, AL 35115, ByrdH@montevallo.edu
Published online: 20 August 2007
Abstract. A comparative study of gravimetric analysis, atomic absorption spectroscopy, and an EDTA titration for the determination of the calcium content in TUMS tablets was conducted in our undergraduate analytical chemistry laboratory. The students carried out the experiments using these techniques and completed a statistical analysis of each experiment to determine if there was a difference in the analytical techniques. These experiments introduce the students to analytical techniques and facilitate an understanding of analytical chemistry. Students develop critical thinking skills, which enable them to choose the best analytical method to solve a problem. Students decide the preferred method by analyzing the same sample using three different analytical techniques, comparing the results, and reflecting on the procedures and results.
Key Words: Laboratories and Demonstrations; quantitative analysis; atomic spectroscopy; gravimetric analysis; titration/volumetric analysis
(*) Corresponding author. (E-mail: firstname.lastname@example.org)
Supporting Materials:The supporting materials include all of the background, procedures, and questions that are given to the students. An equipment list and a chemicals list, including CAS numbers and safety information, are also included for each experiment (148 KB).
Issue date: October