Testing for Gases
The Test for Hydrogen Gas, H2(g).
1) Hydrogen gas has no colour or smell.
2) Hydrogen gas has no effect on moist
or moist universal indicator paper - it is neutral.
3) Hydrogen gas burns with a characteristic 'pop'.
Specific Test for Hydrogen Gas.
is recognised by the 'pop' when it burns.
The 'pop' is the sound of a small explosion,
hydrogen is highly flammable!
2H2(g) + O2(g) 2H2O(l)
This highly exothermic reaction is an example of oxidation.
Hydrogen gas is less
dense than air
and can be
collected by upward delivery, over water or using a gas syringe.
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