The Chemical Educator
ISSN: 1430-4171 (electronic version)
Abstract Volume 19
(2014) pp 104-105
A Sublimation Experiment with Unknowns
Kate J. Graham*, Abdimahad S. Nur and Chris P. Schaller
Chemistry Department, College of Saint Benedict/Saint John’s University, 37 South College Avenue, St. Joseph, MN 56374, email@example.com
Published: 28 March 2014
Abstract. A simple and straightforward sublimation laboratory experiment for the purification of an unknown is presented. This introductory laboratory experiment involves a micro-scale sublimation process. Students purify an unknown from a mixture, determine the identity of their compound with IR and 1H NMR spectroscopy, and comment on the purity of the final sample. The use of unknowns increases students’ individual responsibility and prevents using a partner’s data analysis.
Key Words: Laboratories and Demonstrations; organic chemistry; general chemistry; sublimation
(*) Corresponding author. (E-mail: firstname.lastname@example.org)
Instructor preparation notes with CAS numbers for chemicals, student handouts, experimental procedures with images, and a grading rubric (1.3 MB).