How is oxygen gas prepared in the lab and what test is used to determine if an unknow gas is oxygen?
Procedure:
1. Measure out 10 mL of hydrogen peroxide 3%.
2. Pour this hydrogen peroxide into a large test tube.
3. Place a pinch of manganese dioxide into the test tube.
4. Light a wooden splint on fire.
5. Blow out the wooden splint
6. Place the glowing ember inside the test tube.
Picture:
Draw a picture of your lab set up. Label all parts.
Chemical Reaction:
2H2O2 -----> 2H2O + O2
hydrogen peroxide -----> water + oxygen
Information:
1. H2O2 is an antiseptic.
2. Oxygen is the gas that supports combustion.
3. 21% of air is oxygen
Safety Notes:
Wear an apron and safety glasses
Conclusion:
1. How many times were you able to reignite the wooden splint?
2. What is a catalyst?
3. What was the catalyst in this experiment?