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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
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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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.
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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