Preparation and Characterization of Alkene
Preparation and Characterization of Alkene
Balacanao, Gladys A.1, Miranda, MarilynI2
1 Student (s), Subject/Section, School of Chemical Engineering, Chemistry and Biotechnology, Mapua Institute of Technology; 2 Professor, School of Chemical Engineering, Chemistry and Biotechnology, Mapua Institute of Technology
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ABSTRACT
The purpose of this experiment is to prepare cyclohexene form cyclohexanol, and know the properties of alkene. The first part of this experiment is preparation of cyclohexene. Simple distillation set-up is assembled. (See Figure 1). Exactly 6.0mL of cyclohexanol is weighed in a quick-fit one-necked pear shaped flask. 1.50mL of 85% H3PO4 is measured using the 2mL pipet and added to the weighed cyclohexanol. Another 0.25mL of concentrated H2SO4 is also added. The reagents are mixed using stirring rod. Glass beads were added after it was shake very well. The heat regulator was switched to 5 or 6 and allowed to distill at 130-140°C until 0.50mL of the mixture was left in the pear-shaped flask. The hydrocarbon layer of the distillate (mixture of cyclohexene and water) was transferred to another test tube using dropper. The hydrocarbon layer was extracted twice with 2.0mL of cold water. Anhydrous calcium chloride powder was added to the hydrocarbon layer (enough to still see the liquid) and stirred occasionally for 6minutes. The solid was allowed to settle down. The liquid part of the mixture was removes using pipet and transferred to the 25mL quick-fit round bottom flask. Simple distillation set-up is again assembled. The hydrocarbon was distilled and the distillate at 82-85°C was collected. The receiver was weighed in order to get the weigh of the distillate to be used for computing the percentage recovery. The second part of this experiment is properties of alkene. The prepared cyclohexene was used as test compound. For flammability, 2 drops of the compound was placed in an n evaporating dish and lit with match. For solubility, 2 drops
Balacanao, Gladys A.1, Miranda, MarilynI2
1 Student (s), Subject/Section, School of Chemical Engineering, Chemistry and Biotechnology, Mapua Institute of Technology; 2 Professor, School of Chemical Engineering, Chemistry and Biotechnology, Mapua Institute of Technology
[pic]
ABSTRACT
The purpose of this experiment is to prepare cyclohexene form cyclohexanol, and know the properties of alkene. The first part of this experiment is preparation of cyclohexene. Simple distillation set-up is assembled. (See Figure 1). Exactly 6.0mL of cyclohexanol is weighed in a quick-fit one-necked pear shaped flask. 1.50mL of 85% H3PO4 is measured using the 2mL pipet and added to the weighed cyclohexanol. Another 0.25mL of concentrated H2SO4 is also added. The reagents are mixed using stirring rod. Glass beads were added after it was shake very well. The heat regulator was switched to 5 or 6 and allowed to distill at 130-140°C until 0.50mL of the mixture was left in the pear-shaped flask. The hydrocarbon layer of the distillate (mixture of cyclohexene and water) was transferred to another test tube using dropper. The hydrocarbon layer was extracted twice with 2.0mL of cold water. Anhydrous calcium chloride powder was added to the hydrocarbon layer (enough to still see the liquid) and stirred occasionally for 6minutes. The solid was allowed to settle down. The liquid part of the mixture was removes using pipet and transferred to the 25mL quick-fit round bottom flask. Simple distillation set-up is again assembled. The hydrocarbon was distilled and the distillate at 82-85°C was collected. The receiver was weighed in order to get the weigh of the distillate to be used for computing the percentage recovery. The second part of this experiment is properties of alkene. The prepared cyclohexene was used as test compound. For flammability, 2 drops of the compound was placed in an n evaporating dish and lit with match. For solubility, 2 drops
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