# How to produce fumes in chemistry lab?

In chemistry lab we perform experiments to find the unknown solution. I just want to produce some fumes in lab. We are only allowed to use few common dilute solution like $\ce{NH_4Cl}$, $\ce{NH_4OH},$ $\ce{HCl}$, and few more which are generally allowed to students.

Is it possible to form fumes in lab?

• Why would you want to produce nasty smelling and potentially harmful gasses in the lab? This just sounds very insane to me. – Martin - マーチン Dec 11 '14 at 11:42
• @Martin frankly speaking, my practicals are over in 15-20 minutes but my lab teacher wants that we should be there for at least 45 minutes.But after this she will not force us! – Freddy Dec 11 '14 at 18:03

Aqueous ammonia and hydrochloric acid are solutions of gases.

In a fume hood place two beakers with aliquots of these two solutions (one in each beaker, don't mix) side to side.

Did I mention the fume hood?

You'll see the formation of solid ammonium chloride from the reaction of the two gases.

$$\ce{HCl(g) + NH3(g) -> NH4Cl(s)}$$

Don't forget to clean up the mess!

• I wanted to know with liquid solution, is it possible? – user7484 Dec 13 '14 at 6:58