Pure Acetanilide Recrystallization Lab Report
Purifying Acetanilide by Recrystallization
Results:
Acetanillide Solubility of acetanilide in water is
5.5g/100mL at 100C
0.53g/100mL at 0C
PERCENT YIELD/THEORETICAL YIELD:
Discussion:
Acenatilide is a synthetic organic compound introduced in therapy in 1866 as a fever-reducing drug. Its effectiveness in relieving pain was discovered soon thereafter, and it was used as an alternative to aspirin. The solvent that I selected to recrystallize the crude acenatillide was water. The pure acenatilide did not dissolve in water at room temperature but did dissolve in the water once boiled. The other possible selection would have been petroleum ether but the compound did not dissolve in the solvent …show more content…
In order to know the number of moles of pure acetanilide recovered, I would have to know the molecular formula of the impure acetanilide. If the acetanilide and water mixture was not boiled long enough, there would still be impurities present leading to a decreased yield in pure crystals formed. Some crystals may have been lost in the Buchner funnel or when transferring from the funnel to the beaker. Some crystals may have been lost when transferred from the filter paper to the beaker before obtaining the mass of the crystals. I may have also used too much solvent to the acenatilide leading to a smaller recovery of crystals. There may have also been impurities present in the flask used to heat the mixture creating impurities in my …show more content…
Organic compounds that have been synthesized in the laboratory or isolated from natural sources often contain impurities. Recrystallization is a process which removes impurities from solid organic compounds that are solids at room temperature. The solubility of a compound increases with temperature. As the solution cools the solubility of the compound decreases and crystals begin to form and grow. Pure compounds can be produced from recrystallization. As the heated solution of the compound cools, a pure seed crystal of the compound forms. Additional molecules attach to the crystal in layers forming a crystal lattice. Crystals have a higher affinity for similar molecules than they do from impurities in the solution, removing impurities from the
Results:
Acetanillide Solubility of acetanilide in water is
5.5g/100mL at 100C
0.53g/100mL at 0C
PERCENT YIELD/THEORETICAL YIELD:
Discussion:
Acenatilide is a synthetic organic compound introduced in therapy in 1866 as a fever-reducing drug. Its effectiveness in relieving pain was discovered soon thereafter, and it was used as an alternative to aspirin. The solvent that I selected to recrystallize the crude acenatillide was water. The pure acenatilide did not dissolve in water at room temperature but did dissolve in the water once boiled. The other possible selection would have been petroleum ether but the compound did not dissolve in the solvent …show more content…
In order to know the number of moles of pure acetanilide recovered, I would have to know the molecular formula of the impure acetanilide. If the acetanilide and water mixture was not boiled long enough, there would still be impurities present leading to a decreased yield in pure crystals formed. Some crystals may have been lost in the Buchner funnel or when transferring from the funnel to the beaker. Some crystals may have been lost when transferred from the filter paper to the beaker before obtaining the mass of the crystals. I may have also used too much solvent to the acenatilide leading to a smaller recovery of crystals. There may have also been impurities present in the flask used to heat the mixture creating impurities in my …show more content…
Organic compounds that have been synthesized in the laboratory or isolated from natural sources often contain impurities. Recrystallization is a process which removes impurities from solid organic compounds that are solids at room temperature. The solubility of a compound increases with temperature. As the solution cools the solubility of the compound decreases and crystals begin to form and grow. Pure compounds can be produced from recrystallization. As the heated solution of the compound cools, a pure seed crystal of the compound forms. Additional molecules attach to the crystal in layers forming a crystal lattice. Crystals have a higher affinity for similar molecules than they do from impurities in the solution, removing impurities from the