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ERIC Number: EJ820847
Record Type: Journal
Publication Date: 2007-Oct
Pages: 3
Abstractor: As Provided
Reference Count: 4
ISBN: N/A
ISSN: ISSN-0021-9584
Freezing Point of Milk: A Natural Way to Understand Colligative Properties
Novo, Mercedes; Reija, Belen; Al-Soufi, Wajih
Journal of Chemical Education, v84 n10 p1673-1675 Oct 2007
A laboratory experiment is presented in which the freezing point depression is analyzed using milk as solution. The nature of milk as a mixture of different solutes makes it a suitable probe to learn about colligative properties. The first part of the experiment illustrates the analytical use of freezing point measurements to control milk quality, regarding adulteration by addition of water and lactic fermentation. The second part deals with molecular weight determination from freezing point depression data, using powdered milk as solute. The effective molar masses of whole milk and skim milk are determined and compared. (Contains 2 tables and 2 figures.)
Division of Chemical Education of the American Chemical Society. Subscription Department, P.O. Box 1267, Bellmawr, NJ 08099-1267. Tel: 800-691-9846; Tel: 856-931-5825; Fax: 856-931-4115; e-mail: jchemed@egpp.com; Web site: http://www.jce.divched.org
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education; Postsecondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A