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A way of making HCl gas is to put Chlorine and Hydrogen into a test tube and expose it to UV light.

This reaction is however fast and strong and I would like to store the Hydrochloride from it.

Another way would be to dissolve Chlorine in water, which would make Hydrochloride, but most of it would go in water and make dilute hydrochloric acid. I could however store the HCl fumes from the dilute acid. I do not know about the practicality of this.

What is the best, and exceptionally practical way of making Hydrochloride when the only resources I have are Hydrogen and Chlorine?

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The best and practical way is to sell hydrogen and chlorine, and buy yourself some $\ce{HCl}$ (unless it is prohibited in your jurisdiction). However, I would recommend that only if you have some experience in chemistry and understand quite well the dangers thereof.

The technical answer to your question is: build a galvanic cell with platinum anode and graphite cathode, and feed them with hydrogen and chlorine, respectively. It will perform your reaction in a pretty controllable and non-violent way, and also will give you some electricity for free. Not that I expect you or anyone else to be actually doing this, though.

Why would you need gaseous $\ce{HCl}$, really?

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  • $\begingroup$ In the first paragraph, is it like in the shape of "We will let you use our galvanic cell"? I would like HCl gas for creation of concentrated hydrochloric acid. $\endgroup$
    – John K
    Commented Sep 22, 2015 at 17:32
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    $\begingroup$ Wait, you just asked something about electrolysis - is that your source of hydrogen and chlorine? Are you going to run it at home? Not on a large scale, I hope? Remember that hydrogen in explosive, and both chlorine and HCl are quite poisonous if inhaled. I don't want to be responsible for anyone's death. Again, HCl is easier to buy or make from $\ce{H2SO4}+\ce{NaCl}$. $\endgroup$
    – Ivan Neretin
    Commented Sep 22, 2015 at 17:39
  • $\begingroup$ Electrolysis is the source. Performing in small amounts in a fume hood. I will try the method with the galvanic cell $\endgroup$
    – John K
    Commented Sep 22, 2015 at 17:42
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    $\begingroup$ I don't think it will work without platinum. Really, there are easier chemical ways to HCl (I mentioned one in the previous comment). $\endgroup$
    – Ivan Neretin
    Commented Sep 22, 2015 at 17:47
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    $\begingroup$ How do you plan to store the $\ce {HCl}$ gas you produce? In a balloon? (Don't!) Use $\ce{H2SO4}+\ce{NaCl}$ as Ivan mentioned. It is a method that is used in practice in a professional lab if an HCl lecture bottle is not handy. $\endgroup$
    – K_P
    Commented Sep 22, 2015 at 18:40

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