Solubility
p. 1 Megan Ly Chemistry 231L February 20, 2013
SOLUBILITY
Purpose: To better comprehend solubility behavior by investigating the solubility of various substances in different solvents, looking at miscible and immiscible pairs of liquids, and observing the solubility of organic acids and bases. Reference: Pavia, A Small Scale Approach to Organic Laboratory Techniques pp. 6-‐9 Report: Part A 1) Results in table form Solvent: Solvent: Solvent: methanol Solid Organic Molecules water hexane (intermediate (highly polar) (nonpolar) polarity) Benzophenone Soluble after O Partially Completely 20 seconds soluble after soluble after without C 60 seconds 20 seconds mixing Succinic Acid Insoluble O after 60 seconds; Insoluble Soluble after OH some after 60 20 seconds dissolved, seconds OH pieces were smaller O Biphenyl Partially Partially soluble after Completely soluble after 7 60 seconds; a dissolved seconds; solid litte more after 41 floats to the than 50% seconds top dissolved 2) Benzophenone is a nonpolar molecule and is soluble in nonpolar solvents, such as hexane. It does not have potential for hydrogen bonding, which is why it is insoluble
SOLUBILITY
Purpose: To better comprehend solubility behavior by investigating the solubility of various substances in different solvents, looking at miscible and immiscible pairs of liquids, and observing the solubility of organic acids and bases. Reference: Pavia, A Small Scale Approach to Organic Laboratory Techniques pp. 6-‐9 Report: Part A 1) Results in table form Solvent: Solvent: Solvent: methanol Solid Organic Molecules water hexane (intermediate (highly polar) (nonpolar) polarity) Benzophenone Soluble after O Partially Completely 20 seconds soluble after soluble after without C 60 seconds 20 seconds mixing Succinic Acid Insoluble O after 60 seconds; Insoluble Soluble after OH some after 60 20 seconds dissolved, seconds OH pieces were smaller O Biphenyl Partially Partially soluble after Completely soluble after 7 60 seconds; a dissolved seconds; solid litte more after 41 floats to the than 50% seconds top dissolved 2) Benzophenone is a nonpolar molecule and is soluble in nonpolar solvents, such as hexane. It does not have potential for hydrogen bonding, which is why it is insoluble