Hydrogen peroxide decomposes to form water and oxygen - Edexcel - GCSE Chemistry Combined Science - Question 2 - 2018 - Paper 1
Question 2
Hydrogen peroxide decomposes to form water and oxygen.
The rate of this reaction can be found by measuring the volume of oxygen formed after different time intervals... show full transcript
Worked Solution & Example Answer:Hydrogen peroxide decomposes to form water and oxygen - Edexcel - GCSE Chemistry Combined Science - Question 2 - 2018 - Paper 1
Step 1
State the name of the piece of apparatus labelled Z in Figure 3.
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Answer
The piece of apparatus labelled Z in Figure 3 is a gas syringe.
Step 2
What are the products of the reaction?
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Answer
The only correct answer is B: water and oxygen are the only products of the reaction.
Step 3
Explain what happens to the filter paper and catalyst before finding their mass.
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Answer
A: Dry the filter paper and catalyst before finding their mass.
Step 4
Describe how to prepare the catalyst before use.
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Answer
Use powder/cut up/break up/use smaller pieces.
Step 5
How does the reaction rate change?
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Answer
The rate of reaction is slower, slower, and unchanged.
Step 6
State the balanced equation for the decomposition of hydrogen peroxide.
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Answer
2H2O2(l) → 2H2O(l) + O2(g) or 2H2O2 → 2H2O + O2
State symbols: (l) for liquid and (g) for gas.
