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Environmental Chemistry Using Ultrasound

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Belinda K. Wilmer , Edward Poziomek and Grazyna E. Orzechowska

Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, VA 23529

Melvyn M. Mosher

Department of Chemistry, Missouri Southern State College, Joplin, MO 64801-1595

J. Chem. Educ., 1999, 76 (12), p 1657

DOI: 10.1021/ed076p1657

Publication Date (Web): December 1, 1999

Section:

History, Education, and Documentation

Abstract

With the growing interest of sonication in industry, medicine, and research, the need to introduce students to the theory and applications of sonication also grows. In this demonstration, we describe a simple method for presenting the usefulness of sonication in environmental chemistry. When an aqueous solution of carbon tetrachloride is sonicated, it degrades to produce HCl and HOCl. These products cause a reduction of pH, which can be observed visually with a pH indicator.

Keywords (Audience):

First-Year Undergraduate / General

Keywords (Domain):

Demonstrations

Keywords (Feature):

Tested Demonstrations

Keywords (Subject):

Acids / Bases

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Citing Articles

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This article has been cited by 2 ACS Journal articles (2 most recent appear below).

Chemistry and Luminescence
Pedro Cintas
Journal of Chemical Education2005 82 (6), 837
- Chemistry and Luminescence
  Pedro Cintas
  Journal of Chemical Education2005 82 (6), 837
  The authors of “Turning on the Light: Lessons from Luminescence” have ignored a relevant and unique process: sonoluminescence, the weak emission of light flashes by bubbles in a liquid excited by sound (a pressure wave).
  Abstract | Hi-Res PDF | PDF w/ Links
Chemistry and Luminescence (the author replies)
Patricia B. O'Hara
Journal of Chemical Education2005 82 (6), 837
- Chemistry and Luminescence (the author replies)
  Patricia B. O'Hara
  Journal of Chemical Education2005 82 (6), 837
  Thanks Dr. Cintas for highlighting yet another process by which materials can be induced to emit light.
  Abstract | Hi-Res PDF | PDF w/ Links