CHM143L Experiment 2 - Schoolof...

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School of Chemical Engineering and Chemistry Mapua Institute of Technology Organic Chemistry Laboratory 2  Final Report Preliminary Tests and Solubility Classification  of Organic Compounds   Romero, Von Joby M., Salvador, Kristine Sevilla, Ureah Thea School of Chemical Engineering and Chemistry, Mapua Institute of Technology, Intramuros, Manila, Philippines Experiment No. 2, Submitted on December 8, 2010 at N402. ABSTRACT The   experiment   centers   the   discourse   on  classification of organic compounds by its functional groups. It  is done by an initial preliminary test and with the solubility test.  In the application of preliminary test, two known compounds  are used together with the unknown. Their physical state, color,  odor, and ignition test was obtained. The known compounds  are copper nitrate and acetic acid, which are inorganic and  organic compounds, respectively. A comparison is made from  the   observation  in   the  unknown   sample,   by  which  we  had  concluded that it is an organic compound. In   order   to   have   a   strong   background   about   the  solubility test, we first classify organic compounds of known  functional group using the said test. Butyl bromide, ethanol  sucrose,   butyraldehyde,   ethanoic   acid,   methyl   amine,  nitrophenol, diethyl ether, benzoic acid and propanone were  used. It is found out that they are class X, S n , S, N, S a , S b , N,  S n , A 1  and S n , respectively. We use water, ether, HCl, NaOH,  NaHCO 3 ,   H 2 SO 4 ,   litmus   paper,   and   phenolphthalein   in  classifying each compound based on their solubility and color  change  (for  litmus paper  and phenolphthalein). It  follows a  certain scheme on testing the compound. Each test will link to  another test until we ended up with the class of that compound. We finally determine the class of the unknown. It is  found out to be an amine with few carbon chains because it  falls under class S B . Keywords:   solubility,   classification,   organic   compounds,  solubility test, preliminary test Page |  1  
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1 INTRODUCTION One of the exciting challenges that a chemist faces on  a   regular   basis   is   identifying   organic   compounds.   This  challenge is an excellent way for a student to be initiated into  the arena of chemical research. Millions of organic compounds  are recorded in chemical literature. At first glance, it may seem  a bewildering task to attempt to identify one certain compound  from this vast array, but most of these substances can be  grouped, generally by functional group, into a comparatively  small number of classes. In addition, determination of physical 
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This note was uploaded on 04/27/2011 for the course CHM 143 taught by Professor Ng during the Spring '11 term at Mapúa Institute of Technology.

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CHM143L Experiment 2 - Schoolof...

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