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  Home > JCE Print > Journal of Chemical Education > Issues > 2008  > September  >
In the Laboratory
Quantitative Analysis of Sulfate in Water by Indirect EDTA Titration
Deirdre Belle-Oudry
Department of Chemistry, University of Arizona, Tucson, AZ 85721
Cover
September 2008
Vol. 85 No. 9
p. 1269

Abstract
The determination of sulfate concentration in water by indirect EDTA titration is an instructive experiment that is easily implemented in an analytical chemistry laboratory course. A water sample is treated with excess barium chloride to precipitate sulfate ions as BaSO4(s). The unprecipitated barium ions are then titrated with EDTA. Students are exposed to a number of important concepts including chelation, indirect and back titrations, precipitation, and water quality. A variety of adaptations can be made to the procedure to fit the needs of different lab courses, including general chemistry and environmental chemistry

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Supplement
Student handouts; Instructor notes including answers to the questions in the student handout
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Citation
Belle-Oudry, Deirdre. J. Chem. Educ. 2008, 85, 1269.
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Keywords
Analytical Chemistry; Aqueous Solution Chemistry; Environmental Chemistry; Hands-On Learning / Manipulatives; Laboratory Instruction; Quantitative Analysis; Titration / Volumetric Analysis; Upper-Division Undergraduate; Water / Water Chemistry
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History
Created:
Last Updated:
8/4/2008
8/4/2008
 Caution! 
Experiments, laboratory exercises, lecture demonstrations, and other descriptions of the use of chemicals, apparatus, instruments, computers, and computer interfaces are presented in the Journal of Chemical Education as illustrative of new or improved ideas or concepts in chemistry instruction and are directed at qualified teachers. Although every effort is made to assure and encourage safe practices and safe use of chemicals, the Journal of Chemical Education cannot assume responsibility for uses made of its published materials. Many chemicals are hazardous. Precautions for the safe use of hazardous chemicals and directions for their proper disposal are described in the Material Safety Data Sheets and on the labels. We strongly urge all those planning to use materials from our pages to make choices and to develop procedures for laboratory and classroom safety in accordance with local needs and situations.
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