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Question
What do you observe when Ammonia is brought in contact of hydrogen chloride.gas.
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Solution
Ammonia and hydrogen chloride, both compounds, combine to form a compound, ammonium chloride.
\[\ce{\underset{\text{ammonia}}{NH3(g)} +\underset{\text{hydrogen chloride}}{HCl(g)} ->\underset{\text{ammonium chloride}}{NH4Cl(s)}}\]
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