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  Home > JCE Print > Journal of Chemical Education > Issues > 2001  > August  >
In the Laboratory
The Microscale Laboratory
A Microscale Spectrophotometric Determination of Water Hardness
James S. Gordon,* Stephanie Harman, Kristen Weiss, and Brian Pettegrew
Division of Science, Central Methodist College, Fayette, MO 65248
Cover
August 2001
Vol. 78 No. 8
p. 1089
Abstract
A spectrophotometric titration was performed to determine water hardness. The titration incorporated the traditional titration method employing EDTA as the titrant and calmagite as the indicator. The microscale experiment was carried out in a spectrometer cuvette and made use of a Texas Instruments (TI-83) calculator interfaced through a TI Calculator-Based Laboratory system to a Vernier colorimeter as the detector. Monitoring at 635 nm, one of the colorimeter's fixed wavelengths, was well suited for this analysis. Agreement was found with results from traditional titrations.
More Information
*  Citation
 Gordon, James S. J. Chem. Educ. 2001 78 1089.
*  Keywords
 Analytical Chemistry; Laboratory Instruction; UV-Vis Spectroscopy; Water / Water Chemistry
*  History
 Created:
Last Updated:		 July 10, 2001
August 31, 2005
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