Exp175

=Researcher= Imran Husain =Objective= To determine the solubility of cinnamic acid in acetonitrile, 2-propanol, and dichloromethane. Volumetric flask size effect on percent error was also examined. The additivity of volumes is an [|assumption] and the density of the solid is obtained from ChemSpider prediction. =Results= [|Sheet 1 (solute mass calculation)] [|Sheet 2 (solvent observed density)]

=Discussion= [It would be nice to see this completed -AL]

=Conclusion=

=Log=

2010-08-6
10:33- 2444.1 mg of Cinnamic acid added into 20ml screw top round bottom tube and labeled sample 1 10:38- 1111.9 mg of Cinnamic acid added into 20ml screw top round bottom tube and labeled sample 2 10:48- 3333.1 mg of Cinnamic acid added into 20ml screw top round bottom tube and labeled sample 3 10:55- Specific solvents added to each sample number as can be seen in Sheet 1 11:06- All samples placed into 40C water bath 11:36- All samples removed from bath contained solid precipatate at bottom of test tube indicating saturation. Samples were transferred to new clean 20 ml screw top round bottom tubes and then sonicated. Sonication caused the appearance of solute crystals. 11:42- All samples placed in 25C water bath 12:00- Pure 2-propanol was weighed in 1, 2, 5, and 10ml volumetric flasks the density measurements can be seen in Sheet 2 12:04- Sample 1 weighed in 1, 2, 5, and 10ml volumetric flask; all measurements can be seen in Sheet 3 12:20- Pure acetonitrile was weighed in 1, 2, 5, and 10ml volumetric flasks the density measurements can be seen in Sheet 2 12:25- Sample 2 weighed in 1, 2, 5, and 10ml volumetric flask; all measurements can be seen in Sheet 3 12:35- Pure dichloromethane was weighed in 1, 2, 5, and 10ml volumetric flasks the density measurements can be seen in Sheet 2 12:40- Sample 3 was filtered using glass cotton through a pipett directly into a 5 ml volumetric flask and then transferred into a 1, 2 and 5 ml flask; all measurements can be seen in Sheet 3