Adapting and Modifying the Apparatus for Students to Accurately Determine the Freezing Point of a Solvent and Solution

Autor/inn/en	Li, Shirong; Guo, Jianzhong; Wang, Kewang; Chen, Lin; Hu, Daodao; Bai, Yunshan
Titel	Adapting and Modifying the Apparatus for Students to Accurately Determine the Freezing Point of a Solvent and Solution
Quelle	In: Journal of Chemical Education, 94 (2017) 10, S.1590-1593 (4 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Li, Shirong) ORCID (Bai, Yunshan)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0021-9584
DOI	10.1021/acs.jchemed.7b00253
Schlagwörter	Chemistry; Physics; College Science; Undergraduate Students; Accuracy; Science Equipment; Measurement Equipment; Reliability; Science Laboratories; Climate; Scientific Concepts + Suchen Sie Ihr Suchwort? Chemie; Physik; Messinstrument; Reliabilität; Klima
Abstract	An improved apparatus for measuring freezing points has been developed. Compared to the traditional Beckmann freezing point instrument, the improved one overcame prior difficulties with solidification of liquid and made the solid-liquid equilibrium reversible with heat compensation from a heating tube. The reliability and accuracy were carefully examined by determining the freezing point of the solvent and solution, as well as calculating the molar mass of the solute. It was found that the molar mass was in good agreement with the literature data. Thus, this improved device can effectively and successfully be used in undergraduate physical chemistry laboratory courses. (As Provided).
Anmerkungen	Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2020/1/01