Determining Density, Solubility, And Drying Of A Solid Essay

900 Words 4 Pages
Microscale involves using smaller amounts of chemicals and solids. Therefore, the purpose is to determine density, solubility, recrystallization, extraction, separation, and drying of products by using small quantities. The mass of volume was determined by using the density formula: Density= Weight (g) / volume (mL). Crystallization is key when purifying a solid. The percent recovery determined how much of the substance would remain after purification by calculating: (amount of pure substance collected) / (amount of impure substance began with) x 100. The separation of two liquid layers is identified as extraction and is used to establish a state of equilibrium.

Table 1. Densities of water and Hexane
3mL conical vial= 23.101g 3mL conical vial= 23.101g
Vial with 0.50mL of water= 23.661g Vial with 0.50mL of hexane= 23.457g
D=0.56g/.50mL= 1.12g/mL D=0.356g/.50mL= .712g/mL

Table 2. Solubilities of Solids Water Methanol Hexane
Benzophenone Soluble Insoluble Soluble
Sodium Chloride Insoluble Soluble Soluble
Malonic acid Insoluble Insoluble Soluble
Biphenyl Soluble Soluble Soluble

Table 3. Percent Recovery of Sulfanilamide
Impure Sulfanilamide=.301g Percent Recovery:
Watch glass and filter paper=33.265g .082g/.301g * 100= 27.2%
Watch glass, filter paper, and pure Sulfanilamide= 33.347g

Table 4. Melting Points of Impure and Pure Sulfanilamide
Sulfanilamide Onset Melting Point Range
Impure 163.7C 167.2C 3.5C
Pure 162.2C 166.1C 3.9C

Discussion The densities…

Related Documents