Hydrogen is ignited by palladium metal
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- Connect a Bunsen burner with a hydrogen balloon in order to feed hydrogen via the burner.
- Take some palladium powder with a cotton swab.
- Open a burner outlet to feed hydrogen and introduce the cotton swab into the gas current. After a few seconds hydrogen ignites.
A mixture of hydrogen and oxygen is highly flammable and it is easy to ignite it. Palladium catalyzes the reaction between hydrogen and oxygen, and hydrogen becomes flammable.