Test for Hydrogen Chloride Gas, HCl(g).
1) Hydrogen
chloride
gas has no colour
but it fumes in moist
air (it looks misty).
2) Hydrogen chloride gas has a pungent smell.
3) Hydrogen
chloride gas turns moist
litmus paper from blue to red
and moist universal indicator
paper to red - it is acidic.
4) Hydrogen chloride gas is extremely soluble in water.
It dissolves to form hydrochloric acid, a strong acid,
pH =
1.
5) Hydrogen chloride gas will put out a lit splint.
Specific test.
Hydrogen chloride gas forms a white smoke
with
ammonia.
See the test for ammonia.
Collecting Hydrogen Chloride Gas.
Hydrogen chloride gas is
more dense than air and can
be collected by downward
delivery or using a gas
syringe.
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