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  Home > JCE Print > Journal of Chemical Education > Issues > 1999  > November  >
In the Classroom
View from My Classroom
Investigating the Cuprammonium Rayon Process in a High School Laboratory
Lauren J. Pickard and Mary E. Harris
John Burroughs School, St. Louis, MO 63124
Cover
November 1999
Vol. 76 No. 11
p. 1512
Abstract
We have found the cuprammonium rayon process to be an excellent system for high school independent study. Meeting twice a week provided time for the student-teacher investigation to result in a productive year of study. One can study the shift of the equilibrium to the complex ion, tetraamminecopper(II) hydroxide, and then return to copper(II) hydroxide by adding saturated copper(II) sulfate. The pH dependence of this equilibrium shift is studied as well as the pH dependence of Schweizer's reagent used to dissolve a-cellulose. The methods for rayon fiber formation and rayon disks are described. The fibers in a cuprammonium rayon membrane for a kidney dialysis machine are pictured.
More Information
*  Citation
 Pickard, Lauren J.; Harris, Mary E. J. Chem. Educ. 1999 76 1512.
*  Keywords
 AcidÐBase Chemistry; Demonstrations; Equilibrium; Polymer Chemistry; Introductory / High School Chemistry
*  History
 Created:
Last Updated:		 October 12, 1999
June 23, 2005
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