Sunday, December 22, 2019

Lab Report Steam Distillation - 1025 Words

Introduction: Steam distillation is a process used often in chemistry to extract a particular component of a mixture at a temperature above the temperature where the substance starts to degrade. As a homogeneous mixture is cooled while being exposed to a component in gaseous form, the partial pressures of the parts (hypothetical pressure of a gas if it had the same volume as the total volume at the same temperature) increases over time. Extraction can occur when the sum of the partial pressures is greater than the atmospheric pressure. Two qualitative tests are conducted in this lab: one with KMnO4 and another using FeCl3. KMnO4 (potassium permanganate) is able to oxidize a double bond forming a 1,2-diol at room temperature. This tests for a presence of a double bond and a positive test is a color change from purple to brown. FeCl3 (iron (III) chloride) reacts with phenols, forming into chemical complexes with different colors. This tests for a presence of a phenol group and a positive test is a color change from yellow to blue, green, red, or purple. Eugenol, or clove oil, has a double bound with a phenol group attached to it so when tested with potassium permanganate and iron (III) chloride, positive results should occur. These tests will help check if eugenol was successfully extracted. The purpose of this experiment is to isolate clove oil from freshly ground cloves by steam distillation and then analyze the clove oil with the two tests described above. MaterialsShow MoreRelated0919 Lab Report 3 Steam Distillation and 4 Crystallization2457 Words   |  10 PagesReuven Ilyayev Lab Instructor: Maciej Domaradzki Labs 3 amp; 4 09/19/11 Objective: In steam distillation lab (lab 3), we must obtain pure Eugenol from cloves through the process of steam distillation. In the crystallization lab (lab 4) part 1, we must acquire the best possible pure crystallization of acetylsalicylic acid from aspirin and in part 2 we must obtain a similar pure crystallization of benzil from an impure mixture of benzil. Materials: In lab 3, we used 75 g of cloves fromRead MoreEssay about Extraction of Eugenol from Cloves Oil994 Words   |  4 PagesIsolation of Acetyleugenol (Clove Oil) from Cloves Purpose In this experiment, you will obtain the essential oil from cloves by steam distillation. You will then separate a component (acetyleugenol) from the oil by liquid-liquid extraction. Finally, you will isolate the acetyleugenol by using a rotovap for reduced pressure distillation, which will remove the organic solvent (dichloromethane). 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Cr (VI) is rather orange, but Cr (III) is dark green - therefore by oxidizing the alcohol (2-butanol), an orange Cr (IV) is reduced to green. NMR and IR tests were taken to determine the result, and the crystallized derivative ofRead MoreSalt-Water Mixture Lab Report1866 Words   |  8 Pagesobservations recorded throughout the duration of this experiment. First off, salt-water is a homogeneous mixture, meaning that the composition is uniform throughout. In addition, water is a substance that evaporates when exposed to heat and turns into steam. The water changed state from a liquid to a gas because the water reached its boiling point, while the salt was still in solid form, just as it had been in the mixture. 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