The Chemical Educator
ISSN: 1430-4171 (electronic version)
Abstract Volume 17
(2012) pp 073-077
Analysis of Mineral Water: A General Chemistry Laboratory Experiment
Ali Bazzi*, Krisanu Bandyopadhyay, Judith Bazzi, and Ogie Stewart
University of Michigan-Dearborn, Department of Natural
Science, 4901 Evergreen Road, Dearborn, Michigan, USA 48128-1491, email@example.com
Published: 1 June 2012
Abstract. The experimental procedure and student results for the analysis of several mineral water brands in a multi-section general chemistry course are presented and discussed. Four commercial mineral water brands were analyzed for total dissolved solids (TDS), total water hardness expressed as ppm of calcium carbonate, and pH. These are important and regularly monitored water quality parameters. Gravimetry, ethylenediaminetetraacetic acid (EDTA) complexometric titration, and pH measurements were applied to real-world samples that are familiar to students. In addition to its daily life relevance, this laboratory experiment provided a milieu for general chemistry students to evaluate the precision of multiple data sets and to establish a connection between their laboratory experience and topics covered in lecture such as acid-base, buffer, complex formation, and stoichiometry and concentration unit conversion. Overall, the students’ results for all parameters had good precision and were in reasonable agreement with the published values.
Key Words: Laboratories and Demonstrations; general chemistry; mineral water; analytical chemistry; gravimetry; EDTA titration; total dissolved solids
(*) Corresponding author. (E-mail: firstname.lastname@example.org)
Supporting Materials:The laboratory procedure handout and instructor’s notes are available (539 KB).