Small-Scale Kinetic Study of the Catalyzed Decomposition of Hydrogen Peroxide

The rate of decomposition of hydrogen peroxide with pyrolusite as a catalyst was studied directly by following the formation of oxygen bubbles. The apparatus consisted of a barrel from a 2-ml Beral pipet inserted over a micropipet tip which was fitted into a one-hole stopper. The stopper assembly wa...

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Bibliographic Details
Published inJournal of chemical education Vol. 75; no. 2; p. 215
Main Authors Ragsdale, Ronald O, Vanderhooft, Jan C, Zipp, Arden P
Format Journal Article
LanguageEnglish
Published Easton Division of Chemical Education 01.02.1998
American Chemical Society
Subjects
Advanced Courses
Chemical reactions
Chemistry
Climate
Data Analysis
Decomposition
Hydrogen ion concentration
Hydrogen peroxide
Kinetics
Organic Chemistry
Research Methodology
Science education
Small scale
Student Records
Water
New York
United States > US
The Microscale Laboratory
Hands-On Learning / Manipulatives
Inorganic Chemistry
Catalysis
High School / Introductory Chemistry
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Summary:The rate of decomposition of hydrogen peroxide with pyrolusite as a catalyst was studied directly by following the formation of oxygen bubbles. The apparatus consisted of a barrel from a 2-ml Beral pipet inserted over a micropipet tip which was fitted into a one-hole stopper. The stopper assembly was placed in a 20-mL glass bottle reaction vessel. The hydrogen peroxide can be obtained from the super market and the catalyst, a piece of pyrolusite, can be recycled. The reaction order was found to be 1.1 + 0.2 by 240 pairs of students. The activation energy was 35 + 14 kJ. Reproducible data have also been obtained with the minerals, psilomelane, maganite, and groutite as catalysts.
ISSN:0021-9584
1938-1328
DOI:10.1021/ed075p215