Question 13: The decomposition of hydrogen peroxide: H2O2 -> H2 + O2 is a first order reaction with k=0.0438/min. If the initial concentration of H2O2 is 2.50 M and the decomposition is carried out, answer the following questions to three significant figures by filling in the blanks. The slope of a plot of In[H202] vs. t in minutes would be The time required until the concentration of H2O2 was 1.00 M: minutes The time required until the concentration of H2 was 1.00 M: The H2O2 concentration after 10.0 minutes of decomposition: minutes M The instantaneous rate of loss of H202 at 10.0 minutes (Hint: use the previous answer and remember the form of the first order rate law): M/min

Question 13: The decomposition of hydrogen peroxide: H2O2 -> H2 + O2 is a first order reaction with k=0.0438/min. If the initial concentration of H2O2 is 2.50 M and the decomposition is carried out, answer the following questions to three significant figures by filling in the blanks. The slope of a plot of In[H202] vs. t in minutes would be The time required until the concentration of H2O2 was 1.00 M: minutes The time required until the concentration of H2 was 1.00 M: The H2O2 concentration after 10.0 minutes of decomposition: minutes M The instantaneous rate of loss of H202 at 10.0 minutes (Hint: use the previous answer and remember the form of the first order rate law): M/min

Chemistry by OpenStax (2015-05-04)

1st Edition

ISBN:9781938168390

Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Chapter12: Kinetics

Section: Chapter Questions

Problem 28E: For the reaction QW+X, the following data were obtained at 30 C: [Q]initial (M) 0.170 0.212 0.357...

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11.51 Peroxyacetyl nitrate (PAN) has the chemical formula CtHjNOj and is an important lung irritant in photochemical smog. An experiment to determine the decomposition kinetics of PAN gave the data below. Determine the order of reaction and calculate the rate constant for the decomposition of PAN. Time, t (min) Partial Pressure of PAN (torr) 0.0 2.00 X 10~’ 10.0 1.61 X 10~} 20.0 1.30 X 10_J 30.0 1.04 X 10"’ 40.0 8.41 X 10-4 50.0 6.77 x 10-4 60.0 5.45 X 10-4
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The label on a bottle of 3% (by volume) hydrogen peroxide, H2O2, purchased at a grocery store, states that the solution should be stored in a cool, dark place. H2O2decomposes slowly over time, and the rate of decomposition increases with an increase in temperature and in the presence of light. However, the rate of decomposition increases dramatically if a small amount of powdered MnO- is added to the solution. The decomposition products are H2O and O2. MnO2 is not consumed in the reaction. Write the equation for the decomposition of H2O2. What role does MnO2 play? In the chemistry lab, a student substituted a chunk of MnO2 for the powdered compound. The reaction rate was not appreciably increased. WTiat is one possible explanation for this observation? Is MnO2 part of the stoichiometry of the decomposition of H2O2?
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