Analysis of Hydrocarbons
Myra Gurango, Geneva Guy, Micah Hernandez* and Joyce Lagarde Department of Chemistry, University of Santo Tomas, Manila, Philippines
The organic compounds hexane, toluene, cyclohexene and naphthalene in hexene were subjected to parallel chemical testing to differentiate their intrinsic physical properties in terms of structure and behavior. The physical state and color were noted by simple physical observation. Nitration Testing was conducted for preliminary parallel testing until a positive result of yellow oil was seen. For the second and final testing, oxidation was done through introducing 3 drops of KMnO4 reagent and 2 drops of 10% NaOH solution to 5 drops of the sample organic compound in a test tube. The identity of the hydrocarbon was determined, thus having naphthalene in hexane as the yielded identity of the given sample.
Hydrocarbons are compounds that contain only carbon and hydrogen atoms. Hydrocarbons may be divided into two large classes namely: Saturated hydrocarbons and unsaturated hydrocarbons. Saturated hydrocarbons are the simplest type of organic compounds. They are hydrocarbons in which all carbon- carbon bonds are single bonds. An example of a saturated hydrocarbon is an alkane. Unsaturated hydrocarbons are hydrocarbons that contain one or more carbon-carbon multiple bonds like double bonds, triple bonds, or both. Saturated and Unsaturated hydrocarbons have similar physical properties, but their chemical properties are different. Unsaturated hydrocarbons are chemically more reactive than saturated ones. This is because of the presence of carbon-carbon multiple bonds in such compounds and these multiple bonds serve as locations were chemical reactions can occur.
Figure 1. Saturated Hydrocarbon
References:  http://www.scribd.com/doc/25377353/Classification-Tests-for-Hydrocarbons
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