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  Home > JCE Print > Journal of Chemical Education > Issues > 2004  > September  >
In the Laboratory
Application of Light-Emitting Diodes and Photodiodes Coupled to Optic Fibers To Study the Dependence of Liquid Viscosity on Temperature
L. Victoria and A. Arenas
Facultad de Química, Universidad de Murcia, Campus de Espinardo, Murcia 30071, Spain

C. Molina
Departmamento de Informática de Sistemas, Universidad Católica de Murcia, Campus de los Jerónimos, Murcia 30107, Spain
Cover
September 2004
Vol. 81 No. 9
p. 1333
Abstract
We describe how light-emitting diodes (LEDs) and photodiodes coupled to optic fibers can be applied to study the dependence of viscosity of various liquids solutions on temperature using a commercially-available viscosimeter (Ostwaltd). The experimental device, which is cheap to construct, is accurate and suitable for a introductory-level laboratory course in physical chemistry. It also serves to introduce students to the concepts of the modulation and demodulation of signals used in instrumental analysis, the manipulation of sensors and optic and electronic components since students set the instrument up to optimize its functioning for subsequent data acquisition.
Supplement
Instructions for the students and notes for the instructor are available.
*  Contents Folder JCE2004p1333W containing:
Lab Documentation.doc (Microsoft Word) and
Laboratory Calculation.xls (Microsoft Excel)
 
*  Download



 
More Information
*  Citation
 Victoria, L.; Arenas, A.; Molina, A. J. Chem. Educ. 2004 81 1333.
*  Keywords
 Instrumental Methods; Interdisciplinary / Multidisciplinary; Laboratory Equipment / Apparatus; Laboratory Instruction; Physical Chemistry; Physical Properties
*  History
 Created:
Last Updated:		 July 28, 2004
August 13, 2004
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