Dehydration Of Cyclohexene Lab Report

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Experiment F: Dehydration of Cyclohexanol to Cyclohexene March 18, 2013 OBJECTIVES * Gain familiarity of dehydration mechanism and refractive index * Synthesize cyclohexene through dehydration of cyclohexanol by using phosphoric acid as catalyst * Grow in familiarity in reading IR spectra and data BALACED CHEMICAL EQUATION FOR THE DEHYDRATION C6H12O + H3O4P C6H10 + H2O TABLE OF PROPERTIES AND EQUIVALENTS NameCASChemical FormulaStructure | FW (g/mole) | BP/MP (° C) | Density (g/mL) | Refractive index | Molar amounts added (mol/L) | Limiting reagent | Hazards | Cyclohexanol108-93-0C6H12O | 100.16 | 161.125.15 | 0.96 | n20/D 1.465 | | Yes | Results in skin, respiratory tract and eye irritation; hazardous if swallowed |…show more content…
Bring the contents of the distillation flask to a gentle reflux (i.e., vapors are condensing in the first ¼ to 1/3 of the vertical condenser and dripping constantly back into the flask below). Maintain this reflux for 10 minutes, then increase the heat in order to distill the liquid into the collection flask, then the column, and even the distillation head with aluminum foil (shiny side IN). Continue distillation of the cyclohexene product until the volume in the distillation flask is reduced to about 1 mL. Ask the instructor to assist you in removing the heat source and sand bath for the almost empty flask; use Ove Gloves and/or clamps to avoid burns. |…show more content…
Transfer the distillate via Pasteur pipet into a 15-mL centrifuge tube. Wash the distillate with two 2.5-mL portions of water, removing and setting aside the water layer at each step. Transfer the organic material to a small, dry Erlenmeyer flask, leaving behind the last drops of the water layer. Remove any drops of water that were accidentally transferred to the Erlenmeyer flask, if any, then add small amounts of anhydrous sodium sulfate as drying reagent. When the liquid is dry, it will be transparent and some of the drying agent will flow freely like beach sand. Cork this flask and seal it with two layers of Parafilm, then store it until you are ready for a second distillation. |

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