Your Safer Source for Science

Since 1977

Address P.O. Box 219 Batavia, IL 60510
Phone 800-452-1261
Fax 866-452-1436
Email flinn@flinnsci.com

Molar Mass by Freezing Point Depression—College Level Classic General Chemistry Laboratory Kit

By: The Flinn Staff

Item #: AP7948

Price: $38.50

In Stock.

College Level Classic General Chemistry Lab Kit: Molar Mass by Freezing Point Depression is an engaging activity where the molar mass of an unknown subject is found by measuring the freezing point depression of substances.

See more product details

This item can only be shipped to schools, museums and science centers

Product Details

College Level Classic General Chemistry Experiment Students determine the molar mass of an unknown substance by measuring the freezing point depression of a solution of an unknown substance and the compound BHT (2,6-Di-tert-butyl-4-methylphenol). The freezing point of BHT is determined first, followed by the freezing point of a solution of the known substance dissolved in BHT. The freezing depression constant, kfp, for BHT is calculated from these values and used, along with the freezing point depression of a solution of the unknown substance and BHT, to calculate the molar mass of the unknown. Students gain the recommended familiarity with the observation and recording of phase changes. An alternative microscale procedure is included as a supplement. Complete for 24 students working in pairs.

Specifications

Materials Included in Kit: 
Cetyl alcohol, flake, 30 g
Stearic acid, reagent, powder, 30 g
2, 6-tert-butyl-4-methylphenol, BHT, 200 g