The Laboratory Preparation of Oxygen Gas: O2
Introduction.
Oxygen gas can be made in the lab by the decomposition of hydrogen peroxide.
The decomposition occurs naturally, but very slowly, so is sped up with a catalyst
(Manganese Dioxide).
Hydrogen Peroxide → Oxygen + Water
Apparatus
Method
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Set up apparatus as in diagram/as per demonstration with one spatula of
manganese dioxide at the bottom of the boiling tube.
Collect 10cm3 of hydrogen peroxide solution in a measuring cylinder
SLOWLY add the peroxide solution through the funnel
Collect a couple of tubes of oxygen gas as demonstrated
Test the gas with a glowing splint
Questions
What is the chemical symbol for Oxygen?
What is the chemical formula of Oxygen gas?
What is the Relative Formula mass of Oxygen gas?
What is the laboratory test for Oxygen gas?
What is a catalyst?
Write a balanced chemical equation, with state symbols, for the decomposition of
hydrogen peroxide.