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Following Two Oxygen Changes in Peroxide 4 questions
Following Two Oxygen Changes in Peroxide
Base your answers on the information provided and your knowledge of chemistry. Use the 2025 Chemistry Reference Tables as needed.
A class models the decomposition of hydrogen peroxide. It assigns oxidation number −1 to oxygen in H2O2, −2 to oxygen in water, and 0 to oxygen in elemental O2. The equation shows four oxygen atoms in the starting molecules.
2H2O2 → 2H2O + O2
Question 1
Which product contains oxygen with a higher oxidation number than it had in peroxide?
- H₂O only
- O₂ only
- Both products
- Neither product
Question 2
Identify the product whose oxygen is reduced. Use the given numbers to explain.
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A student compares all four oxygen atoms together. Two are in the water molecules and the other two are in the O2 molecule.
Question 3
Find the total increase in oxidation number for the oxygen that becomes O₂. Compare it with the total decrease for the oxygen that becomes water.
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Question 4
A student argues that one element cannot be oxidized and reduced in the same reaction. Use the two products to evaluate that claim.
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