Testing for Gases
What are the General Tests for Hydrogen Gas?
1) Hydrogen gas, H2(g) 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'.
What is the Specific Test for Hydrogen Gas?
is recognised by the 'pop' when it burns.
The 'pop' is the sound of a small explosion.
Hydrogen gas is highly flammable!
2H2(g) + O2(g) 2H2O(l)
This highly exothermic reaction is an example of oxidation.
How is Hydrogen Gas Collected?
Hydrogen gas is less
dense than air
and can be
by upward delivery, over water or by using a gas syringe.
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