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The elimination experiment is popular with students, particularly the combustion part. The alkene is heavier than air and can be ignited using a Bunsen flame. Students have to be persuaded to remove the test tube from the Bunsen flame once it has ignited and not return it when the gas has all burnt!
Materials:
| 20% potassium hydroxide in ethanol (3 cm3) | 2-chloro-2-methylpropane (1 cm3) |
| 1 M nitric acid (5 cm3) | 0.02 M silver nitrate (20 cm3) |
| 0.1% bromine water (2 cm3) | Ethanol [IDA] (20 cm3) |
| 1-chlorobutane (3 drops) | 1-bromobutane (3 drops) |
| 1-iodobutane (3 drops) | 2-chlorobutane (3 drops) |
| Test tubes and bungs | Full range indicator paper |
| Glass rod | Delivery tube |
| Bunsen burner | Heat proof mat |
| Glass wool | Delivery tube |
| Trough | Laboratory jack or alternative |
| Disposable gloves | 400 cm3 beaker |