Which of the following gases can be dried using concentrated sulfuric acid? Ammonia, Chlorine, Hydrogen Chloride.

Both chlorine and hydrogen chloride .

Concentrated sulfuric acid should not be used to dry ammonia because ammonia itself would react with sulfuric acid.

Explanation:

Keep in mind that concentrated sulfuric acid is:

Because of its acidity, concentrated sulfuric acid will readily react with gases that form basic solutions when mixed with water. Therefore, concentrated sulfuric acid should not be used to dry those gases. Neither should concentrated sulfuric acid be used to dry gases that might lose electrons to concentrated sulfuric acid. Otherwise, a significant portion of those gas would be consumed in those unexpected chemical reactions.

Ammonia is one such gas. Because the solubility of ammonia in water is remarkably high, the humid ammonia gas in this question would likely exist in the form . When that gas comes into contact with sulfuric acid , the following reaction could take place:

.

As long as concentrated sulfuric acid isn't used up, very little ammonia would exit from the other side of the drying apparatus. Hence, concentrated sulfuric acid shouldn't be used to dry ammonia.

Concentrated sulfuric acid does not react with chlorine or HCl under typical lab conditions. Therefore, it should be possible to dry chlorine and with concentrated sulfuric acid in a lab.

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