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?

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    $\begingroup$ Why would you want to produce nasty smelling and potentially harmful gasses in the lab? This just sounds very insane to me. $\endgroup$ Dec 11, 2014 at 11:42
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    $\begingroup$ @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! $\endgroup$
    – Freddy
    Dec 11, 2014 at 18:03

1 Answer 1


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!

  • 1
    $\begingroup$ I wanted to know with liquid solution, is it possible? $\endgroup$
    – user7484
    Dec 13, 2014 at 6:58

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