Extraction and Evaporation: Separating the Components of "Panacetin"

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Extraction and Evaporation: Separating the Components of "Panacetin" Submitted- July 17, 2012

Introduction
The purpose of this lab is to investigate the composition of a compound suspected to be Panacetin, a type of pain-killer. Panacetin is typically made up of sucrose, aspirin, and acetaminophen, but the third component in this experiment is unknown. The unknown component is suspected to be a chemical relative of acetaminophen, either acetanilide or phenacetin. Using techniques such as extraction, evaporation, and filtration, the three components will be isolated based on their solubilities and acid-base properties. Then, the percent composition of Panacetin can be deduced based on the masses of the three dried components. The compounds being studied are as follows:

Calculations
Theoretical Percent Recovery
.4015 g sample of Panacetin composition: 10% sucrose, 40% aspirin, and 50% unknown Theoretical Composition Percentages:
.4015(10%)=0.0400 g of Sucrose
.4015(40%)=0.1606 g of Aspirin
.4015(50%)=0.2001 g of acentanilide or phenacetin
Results and Observations
Table 1: Weights of all Apparatuses
Mass in gramsTotal Product Weight (grams)
Centrifuge Tube 18.8290.060
Centrifuge Tube with Sucrose18.889
Glass disk 32.7550.091
Glass disk with Aspirin32.846
5 mL Vial 23. 3770.125
5 mL Vial with Unknown23.502
Caption: Table 1 shows the masses of the scientific instruments, before and after, the reactions occurred. Percent Recovery
Figure 1. (.060g sucrose + .091g aspirin + .125g unknown) / Original Mass of Panacetin(.4015) x100 = 68.74% yield Composition Percentages
Figure 2:
Sucrose: 0.060/.276 = .2174 x 100 = 21.74%
Aspirin: 0.091/.276 = .2529 x 100 = 32.97%
Unknown: 0.125/.276= .4789 x 100 = 45.29%
Table 2: Components, Mass, and Percent Composition
CompoundMassPercent Composition
Sucrose 0.06 g 21.74%
Aspirin0.091 g32.97%
Unknown0.125 g45.29%
Caption: The...
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