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Isolation Of An Essential From Cloves Lab Report

1018 Words5 Pages

Isolation of An essential from Cloves by Steam Distillation Philippe DAvid CHEM 2315-009 October 14, 2014 In distillation the vapor pressure of the solution is the sum of the partial pressures of the components statede by Dalton’Law PTotal = PA + PB. Following Dalont's Law, Each compnent of the solution has its own vapor pressure (PA or PB) which are summmed together leadiung to a higher vapor pressure lowering tyhe combined boiling point for the mixture. When the total pressure of the mixture rheaches 760 torr it will boil ficilitating the seperation and purifacation of the mixture. Addtionally, mainting a lower temputure has the effect of preventing decomposition of the product. The process is specificalay called steam …show more content…

Table Common 1H NMR Impurities There was a single doublet at 2.4ppm on hte 1H NMR 1H NMR However an eugnol molecule with an ester addached to an oxegen atom that would result in a around 2.2 ppm which could correspon The Steam distillation of cloves produced 1.20 g of an final product, corresponding …show more content…

THe recorded percent is much higher than the expected 10% that the scietific liturre states is in cloves. This leads to the concuolsion that at least 50% percent of the final product was an imourity. In fact, observfations made durring the lab noted that final product isolated apeared to have beads of oil flotiong in a liquid. There are three possible explinations for this result: it is pissible that during the lab dicloroform was mististenly used instead of ether. It is also a possivblity that the one of the many flask used in the expiriemnt may have conatinedd saome contaiminates from previous use. And finally is is possible that poor tenique was enplyed allwoinf water or ether to get through the many purifaction steps taken. REFERENCES 1. Pavia, D. L.; Lampman, G. M.; Kriz, G. S.; Engel, R. G. Introduction to Organic Laboratory Techniques, A Microscale Approach; 3rd ed.; Brooks/Cole: Pacific Grove, CA, 1999; p. 139. 2. Spectral Database for Organic Compounds (SDBS). www.aist.go.jp/RIODB/SDBS/cgi-bin/cre_index.cgi (accessed October, 2014) 4.http://www.chem.sc.edu/faculty/shimizu/site/Group_Stuff_files/HNMR%20Solvents%20List.pdf 5. Wenqiang, G.; Shufen, L.; Ruixiang, Y.; Shaokun, T.; Can, Q. Food Chemistry, 2007, 101,

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