Dr. Márta Rózsahegyi
Tools: test tube, test tube catch, 10 ml graduate cylinder, dropper, Bunsen burner, iron tripod, asbestos guid
2 ml distilled water was added to 5 ml acetone. 1.4 ml of the mixture was poured into a test tube. 0.8 ml bromine was poured into the test tube under hood (this means approximately 25 drops bromine, so could be added with a dropper). The mixture was heated carefully under hood. At the first time the dark brown mixture was frothed, after that was fined down and become light yellow. 0.8 mg magnesium-oxide was added to the mixture when it was gotten cold.
If someone drops the mixture to an asbestos grid and heats it, everybody will cry in the lab.
Tear-gas is bromine-acetone. The steps of reaction are: