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  Home > JCE Print > Journal of Chemical Education > Issues > 2007  > August  >
In the Classroom
JCE DigiDemos: Tested Demonstrations
Microscale Demonstration of the Paramagnetism of Liquid Oxygen with a Neodymium Magnet
Bruce Mattson
Department of Chemistry, Creighton University, Omaha, NE 68178-0104

checked by Douglas Mulford
Department of Chemistry, Emory University, Atlanta, GA 30322-2210

Cover
August 2007
Vol. 84 No. 8
p. 1296

Abstract
When a neodymium magnet is brought near a suspended small glass tube (2.5 mL) containing 2 mmol (64 mg) liquid oxygen, the tube is attracted to the magnet demonstrating oxygen's paramagnetism. Larger quantities of liquid oxygen can be produced in a similar fashion using a food storage bag filled with oxygen in place of a 60 mL syringe used to condense 2 mmol oxygen. On the larger scale, the blue color of liquid oxygen is readily observable by students.
Supplement
A QuickTime movie of this demonstration is available for viewing online.
More Information
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Citation
Mattson, Bruce. J. Chem. Educ. 2007, 84, 1296.
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Keywords
Demonstrations; Descriptive Chemistry; First-Year Undergraduate / General; Gases; Hands-On Learning / Manipulatives; High School / Introductory Chemistry; Inorganic Chemistry; Magnetic Properties; MO Theory; Molecular Properties / Structure; Oxygen; Upper-Division Undergraduate
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History
Created:
Last Updated:
6/22/2007
7/6/2007
 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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