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Tests for Other Gases
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Test for Hydrogen Gas,
H2(g).
Hydrogen
1) Has no colour or smell.
2) Has no effect on
moist litmus paper
or moist universal indicator paper -
it is neutral.
3) Burns with a characteristic 'pop'.
Specific
test.
Hydrogen gas
is recognized by the 'pop' when it burns.
The 'pop' is the sound of a small
explosion,
hydrogen is extremely flammable!
hydrogen
+ oxygen
water
(hydrogen oxide).
2H2(g)
+ O2(g)
2H2O(l)
This highly exothermic reaction is an example of oxidation.
Collecting Hydrogen.
Hydrogen
is less dense than air
and can be collected by upward delivery, over water or using a gas
syringe.
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Copyright © 2008 Dr. Colin France. All Rights Reserved.