Chemical Kinetics Unit. Joe Bengiovanni and Erin Sicard Virtual Molecular Dynamics Laboratory Workshop July 1-12, 2002 Boston University. Introduction. Topics covered: collision theory, activation energy, catalysis, rates of reactions, first-order reactions, second-order reactions.
Joe Bengiovanni and Erin Sicard
Virtual Molecular Dynamics Laboratory Workshop
July 1-12, 2002
Topics covered: collision theory, activation energy, catalysis, rates of reactions,
first-order reactions, second-order reactions
VMDL software and Simulab files
Crystal Violet lab:
Calculator Based Laboratory (CBL) System
Vernier Adaptor Cable
Crystal violet chemical
30% Hydrogen Peroxide (try pool shock)
Discussion -Intro to reactions.
Discussion -Collision theory, rates in general (slow, fast, medium). .
Demonstrations -rust, Mg +HCl, Plaster
Discussion -Factors affecting reaction rates (temp, pressure, volume, concentration, surface area)
Demonstration -Candle/Candle-1 Simulab
Assignment -Design an Experiment project
Day 3 -Double lab period
Discussion -Activation energy
Demonstration -MnO2 + H2O2
Discussion -Intro to catalyst and enzymes
Activity -The Clock Reaction
Assignment -The Clock Reaction –Graphical analysis
Discussion -Rate laws
Activity -1st order Simulab
Assignment -Answer Simulab questions homework
Review -1st order Simulab- hand in results and graphs
Activity -Kinetics of a Draining Buret mini wet lab
Classwork -Buret lab questions 1-8
Review -Day 5 classwork
Discussion -2nd order reactions
Demonstration -2nd order Simulab
Day 7 –Double Lab periodLab Activity -Rate law determination of the Crystal Violet Reaction
Assignment -Full lab report write up due 1 week from date of lab
Discussion -Review Crystal Violet Lab
Quiz -Rate laws
Click here for outline text file
“Toothpickase” -Illustrates the relationship between concentration and rate -Demonstrates how enzymes are catalysts
Kinetics of a -Practice in determining reaction rates Draining Buret
First Order Simulab -Provides a dynamic picture of reactions for visual learners
Rate Law Determination -Students use experimental conditions to support study of of the Crystal Violet reaction rates Reaction
The Clock Reaction –Examines important factors (concentration and temperature) that affect reaction rates
MnO2 + H2O2
-show examples of rusted metal and non-rusted metal (slow reaction)
-mix a bit of plaster with water at beginning of class. By end of class it should stiffen and get warmer. (medium rate, exothermic reaction)
-mix a bit of Mg(s) with dilute HCl and see the immediate evolution of gas. (fast reaction) Collect gas in an inverted test tube and ignite with a glowing splint for added effect.
-Using 3% H2O2, add a few grams of MnO2 to show catalyzed decomposition of H2O2 to H2O and ½ O2. Ignite a glowing splint over gas to show oxygen production. For added effect, add a drop of food coloring to 30% H2O2 in a large graduated cylinder then add MnO2.
Candle/Candle-1 Simulab -Show these 2 simulations side by side in order to demonstrate the importance of surface area on reaction rates. Candle Simulations are found under Universal/Additional Files.
2nd Order Simulab -This can be done as a whole class activity. Follow procedure 2.2 Second order reaction from page 13 of the yellow book. Data tables can be constructed on the board by the teacher and volunteers and each student can sketch the graphs from the data.
Please note: Any of the Simulabs can be used for demonstration purposes if time or resources are limiting.
SAT II Chemistry Subject Test Format- The College Board http://www.collegeboard.com/sat/center2/chem/format.html
Massachusetts State Frameworks- Department of Education
Vernier Software and Technology
Addison-Wesley, Chemistry Laboratory Manual, Prentice Hall 2000
Virtual Molecular Dynamics Laboratory Manuals and Software, Center for Polymer
Studies, Boston University 2002
Joe Bengiovanni - Bengi71@yahoo.com
Erin Sicard - Erinsicard@yahoo.com