WARNING! This experiment is dangerous! You should NOT perform this at home. ONLY carry out this experiment, if you are a trained chemist, and you understand local safety and legal requirements, which are required to perform such experiments
- Prepare solutions of alkylbenzenes in dichloromethane. Pour 50 ml of dichloromethane into 4 beakers. Add 4.5 ml of benzene into the first beaker, 5.3 ml of toluene into the second beaker, 6.1 ml of ethylbenzene into the third beaker, 7.0 ml of cumene into the fourth beaker.
- Mix the beakers.
- Prepare a solution of bromine in dichloromethane. Pour 100 ml of dichloromethane and 8.2 ml of bromine in a 200-milliliter beaker. Mix thoroughly.
- Add 25 ml of the bromine solution into each of the four beakers.
- Shine bright light on the beakers.
- The yellow color of bromine slowly disappears in the following order: cumene, ethylbenzene, toluene. Benzene doesn't react with bromine under these conditions.