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Magnetic Stirring with the Stirring Bar Length Exceeding the Vessel Diameter
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Department of Chemistry, Oklahoma State University, Stillwater, OK 74078
Department of Physics, Oklahoma State University, Stillwater, OK 74078
J. Chem. Educ., 2002, 79 (2), p 217
DOI: 10.1021/ed079p217
Publication Date (Web): February 1, 2002
Abstract
An improved method for vigorously stirring small volumes of viscous reaction mixtures is described. A description of the movement of a magnetic stirring bar, oriented vertically in a test tube so that it cannot align freely with the magnetic field of the stirrer magnet, is included. This confinement results in more vigorous mixing of small volumes through use of larger and more powerful stirring bars in a reduced volume of liquid as compared to conventional magnetic stirring. The influence of stirring bar shape and size on stirring effectiveness when used with the stirring bar oriented in this manner also is described.
Keywords (Audience):
High School / Introductory ChemistryKeywords (Domain):
Laboratory InstructionKeywords (Subject):
Laboratory Equipment / ApparatusView: Hi-Res PDF | PDF w/ Links
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- Received: August 03, 2009
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