PAG 5.2 The preparation of cyclohexene

Award-winning science educator Dr David Boyce takes you through A Level Chemistry PAG 5.2 The preparation of cyclohexene - but things do not quite go to plan… What begins as a straightforward dehydration experiment quickly turns into a real lesson in practical chemistry when we discover that our cyclohexanol stock is missing. Rather than stop the experiment, we first synthesise the cyclohexanol ourselves before continuing with the preparation of cyclohexene. In this video you will see: • The synthesis of cyclohexanol • Dehydration by reflux using concentrated phosphoric acid • Distillation and purification techniques • Washing and chemical drying of the organic product • Full percentage yield calculations • Testing for the carbon–carbon double bond using bromine water • Analysis of practical errors and unexpected problems Importantly, the mistakes, complications and experimental setbacks are deliberately left in the final edit. Real chemistry is not always neat - and some of the greatest understanding comes from seeing what happens when things go wrong. Ideal for A Level Chemistry students preparing for PAG assessments, practical exams and organic synthesis topics. #ALevelChemistry #OrganicChemistry #Cyclohexene #PAG52 #PracticalChemistry #DrDavidBoyce #ChemistryExperiment #Cyclohexanol