Testing hydrogen
​Hydrogen is a flammable gas. It burns in air to produce water.
A convenient test for hydrogen is to put a lighted splint in the mouth of a test tube full of the gas . The gas will burn with a characteristic squeaky pop if hydrogen is present.
Hydrogen gas can be used as a fuel.
When hydrogen burns in air it combines with oxygen to form water.
This reaction releases energy and it therefore an example of an exothermic reaction
Some squeaky pops
​Task 1.
Watch the video to see and hear the students using hydrogen to make some squeaky pops.
Are all squeaky pops the same?
Try to explain your answer.
Task 2.
Find out and write about three ways to make hydrogen gas. In each case say what the reactants are, what the products are and write down chemical equations for the reactions.
Task 3.
Some say that hydrogen is a perfect fuel since it is not polluting.
Explain why hydrogen is not pollution when it burns.
Others say that hydrogen is not really a clean fuel. Can you explain why they can make this claim?
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