Reference no: EM132732430
Oxygen Lab
Answer questions with data
Mass of MnO2 1.0273 g
Volume of H2O2 112 mL
Appearance of oxygen ***
Splint relights in pure O2 23
Splint relights in O2/air mix 15
Duration candle burning in O2 44 s
Duration candle burning in air 11 s
Compared appearance of candles ***
Sulfur appearance ***
Burning in air ***
Burning in O2 ***
Ashes ***
Litmus red litmus stays red; blue litmus turns red
Iron appearance ***
Burning in air ***
Burning in O2 ***
Ashes ***
Magnesium appearance ***
Burning in air ***
Ashes ***
Post-Lab Questions
1. Write the equation for the reaction we used to prepare oxygen in this lab.
2. Why can oxygen gas be collected by the displacement of water?
3. Write the chemical reaction for the combustion of wood (C6H12O6).
4. Compare the results for the experiment where wood splints were relit in oxygen and in half-oxygen-half-air. Explain the difference.
5. Explain the difference in time burned and brilliance between the two candle flames.
6. Write the chemical equation for the combustion of sulfur to sulfur dioxide.
7. Write the chemical equation for the reaction of sulfur dioxide and water. Is this consistent with the results of your litmus test in that portion of the lab?
8. Write the chemical equation for the combustion of iron to iron (III) oxide.
9. Write the chemical equation for the combustion of magnesium.
10. What do you think, based on the results of your other experiments done in pure oxygen, would have happened if you had burned magnesium in pure oxygen?
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