4 The decomposition of hydrogen peroxide, H,O,, to oxygen and water is catalysed by manganese(IV) oxic a Define the term catalyst. b The results for the decomposition of a sample of hydrogen peroxide are shown in the table. Time/min 5 6 1 2 3 4 7 8 [H,0,1/moldm 1.60 1.04 0.61 0.40 0.25 0.16 0.10 0.06 0.04 i Draw a graph of concentration of hydrogen peroxide (vertical axis) against time (horizontal axis). Draw a curve of best fit. ii Use your graph to determine the half-life of the reaction. Show your working. iii Use your graph to find the rate of reaction after 2min.
4 The decomposition of hydrogen peroxide, H,O,, to oxygen and water is catalysed by manganese(IV) oxic a Define the term catalyst. b The results for the decomposition of a sample of hydrogen peroxide are shown in the table. Time/min 5 6 1 2 3 4 7 8 [H,0,1/moldm 1.60 1.04 0.61 0.40 0.25 0.16 0.10 0.06 0.04 i Draw a graph of concentration of hydrogen peroxide (vertical axis) against time (horizontal axis). Draw a curve of best fit. ii Use your graph to determine the half-life of the reaction. Show your working. iii Use your graph to find the rate of reaction after 2min.
Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter11: Chemical Kinetics
Section: Chapter Questions
Problem 11.30PAE: The rate of the decomposition of hydrogen peroxide, H2O2, depends on the concentration of iodide ion...
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Answer following sub-parts only
b(i), b(ii), b(iii)
![4 The decomposition of hydrogen peroxide, H,O, to oxygen and water is catalysed by manganese(IV) oxide
a Define the term catalyst.
b The results for the decomposition of a sample of hydrogen peroxide are shown in the table.
Time/min
1
2
3
4
6
7
8.
[H,0,1/mol dm3
i Draw a graph of concentration of hydrogen peroxide (vertical axis) against time (horizontal axis).
1.60
1.04
0.61
0.40
0.25
0.16
0.10
0.06
0.04
Draw a curve of best fit.
ii Use your graph to determine the half-life of the reaction. Show your working.
ii Use your graph to find the rate of reaction after 2min.
ci Give the rate equation for the reaction. Explain your answer.
ii Use your answer to part b, i, to calculate the value of the rate constant, k, and give the units.
iii Using your rate equation, find the rate of reaction when [H,0,]=2 moldm-3.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2f4ea592-1fc2-4f80-ab2a-5dc15b87628e%2F453d8e5c-9660-4499-abb7-6c4797429922%2Ftcvls08_processed.png&w=3840&q=75)
Transcribed Image Text:4 The decomposition of hydrogen peroxide, H,O, to oxygen and water is catalysed by manganese(IV) oxide
a Define the term catalyst.
b The results for the decomposition of a sample of hydrogen peroxide are shown in the table.
Time/min
1
2
3
4
6
7
8.
[H,0,1/mol dm3
i Draw a graph of concentration of hydrogen peroxide (vertical axis) against time (horizontal axis).
1.60
1.04
0.61
0.40
0.25
0.16
0.10
0.06
0.04
Draw a curve of best fit.
ii Use your graph to determine the half-life of the reaction. Show your working.
ii Use your graph to find the rate of reaction after 2min.
ci Give the rate equation for the reaction. Explain your answer.
ii Use your answer to part b, i, to calculate the value of the rate constant, k, and give the units.
iii Using your rate equation, find the rate of reaction when [H,0,]=2 moldm-3.
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