"Smoke wihout fire" experiment
How to make two liquids smoke in another flask?
They say there’s no smoke without fire… but with chemists, anything can happen! Before your eyes we make smoke without matches, logs and fire, only using our wits and two liquids.
For the experiment, we’ll need 3 flasks, joined by gas pipes. Into flask №1 we pour 20 ml of a concentrated solution of hydrochloric acid (HCl) and firmly seal it with a stopper with a gas pipe. Into flask №3, we pour a 25% ammonia solution (NH₃), and firmly seal it with a stopper with a gas pipe. We also seal flask №2 with a stopper with a gas pipe, to which we have connected the pipes from the flask with the concentrated solution of hydrochloric acid and the flask with the ammonia solution. We observe the release of white smoke in the second flask. How is this possible, if flask №2 was empty!?
Ammonia and concentrated hydrochloric acid are volatile liquids, at room temperature the solutions evaporate well and turn into HCl and NH₃ gases. The HCl and NH₃ enter flask №2 from flasks №1 and №3, and a chemical reaction takes place with the release of white smoke. It is tiny crystals of ammonium chloride:
The experiment must be carried out in a well-ventilated room or in a draught cupboard, as gaseous ammonia is a toxic compound, and gaseous HCl can cause burns to the respiratory tract. Observe the rules for working with concentrated hydrochloric acid.
Substances of this experiment are toxic and highly dangerous for your health. Do not try this at home. Only under professional supervision