Organic Chemistry 1 at gsu report

Organic Chemistry 1 at gsu report - ORGANIC CHEM LAB FINAL...

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ORGANIC CHEM LAB FINAL REPORT MARGARET HWANG DR. Kennedy MONDAY 5:30-9:15 Unknown # 30-F 09
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I. Introduction The past few experiments were performed in order to identify the particular unknown neat liquid and two compounds of the unknown binary mixture (unknown # 30-F 09) assigned to each student. Lab experiments such as simple distillation and fractional distillation were performed to properly identify these unknowns. Additional information of boiling points, refractive index, infrared spectroscopy, chemical testing, density and mass spectroscopy were obtained to continue the identifications. With all the data collected, compound determination was possible by matching the experimental data with the literature values. II. Neat Liquid Procedure: Refer to page 19 of Chemistry 3100 Lab Manual for detailed procedures. Neat liquid consisted of only one, already in its pure stage, substance. In order to find the purest sample of the neat liquid, simple distillation was performed. By simple distillation, neat liquid was first heated to a constant temperature. The temperature at the first few drops of distillation was the boiling point of the unknown neat liquid. Then the liquid distilled then after for every approximately 3 minutes
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with the temperature gradually rising was collected for further use in obtaining information such as IR, RI, density and chemical testing. Data/ Results: Experiment al Boiling Point Literature Boiling Point Experiment al RI Literatur e RI Experiment al Density Literatur e Density IR Functional Groups 172°C~173 °C 172°C 1.4250 1.4240 0.820g/ml 0.814g/ ml OH Saturated CH Chemical Testing: Refer to Experimental Organic Chemistry by Wilcox pg 166 for the Jones and Lucas test procedures. Jones Test Lucas Test Positive Positive (5 minutes) 2° alcohol Discussion: The boiling point of the unknown neat liquid was equivalent to the literature value of the identified compound. The experimental value of refractive index was 1.4250, which was very close to the literature value of 1.4240. When compared to the literature value of the density, the experimental density of 0.820g/ml was also very in close proximity with the literature value being 0.814g/ml. Although not
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significantly different, the RI and the density had a small variation. This deviation may have resulted from reading error of the scale used to measure the density, which all movement around the area of students and air would be the probable cause for. The RI difference could have also been resulted from a reading error by one’s eyes from the RI machine. By analyzing the IR results of the unknown neat liquid, the compound showed the alcohol functional group. There were also only peaks before the 3000cm-1 zone, around 2857 to 2959cm-1 of the IR, making it easy to conclude that the unknown neat liquid contained only saturated hydrogens. Comparing the literature IR of the identified compound and the experimental IR of the unknown liquid, there were small distinctions but were not critical. These minor variations are
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Organic Chemistry 1 at gsu report - ORGANIC CHEM LAB FINAL...

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