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Kinetics and Reaction Rate
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Kinetics and Reaction Rate— Demonstration Kits, continued
“Magic Genie”—
Chemical Demonstration Kit
By: Jim and Julie Ealy, Retired
The Peddie School, Hightstown, NJ
When potassium iodide is dropped into a flask containing 30% hydro- gen peroxide, a “magical” genie appears in the form of water vapor and oxygen. Demonstration Notes included.
Concepts: Catalysts, gases, exothermic reactions.
Time Required: 15 minutes
Chemicals Provided: Hydrogen peroxide solution 30% and potassium iodide.
See free video at flinnsci.com.
Kinetics of a First-Order Reaction—
Chemical Demonstration Kit
By: Lew Brubacher
University of Waterloo, Waterloo, ON
First-order kinetics come alive as this hydrolysis reaction undergoes repeated color changes of yellow and blue. Bromthymol blue indicator, tert-butyl chloride, water, and a known amount of sodium hydroxide are added together forming a blue solution. tert-Butyl chloride reacts with water via hydrolysis to produce acid. When enough acid is produced to neutralize the base, the reaction instantly flashes to yellow—making it easy for students to recognize when a given amount of tert-butyl chloride has reacted. Students time how long it takes to neutralize each batch of base until all the tert-butyl chloride has reacted. Students use these time values to calculate the hydrolysis reaction order. A dramatic and simple demonstration that improves student understanding of the complex idea of reaction order. Demonstration Notes, along with a reproducible student worksheet and answer sheet are included. Concepts: First-order kinetics, hydrolysis, indicators.
Time Required: 15 minutes
Materials Provided: Acetone, tert-butyl chloride, bromthymol blue indicator solution, sodium hydroxide solution, syringe, Beral-type pipets.
Old Foamey—
Chemical Demonstration Kit
By: Jim and Julie Ealy, Retired
The Peddie School, Hightstown, NJ
This will be your students’ favorite chemical reaction! Mix a combina- tion of chemicals together with dishwashing liquid in a tall borosilicate cylinder and stand back. Watch as a large amount of soapy foam erupts from the cylinder. The catalyzed decomposition of hydrogen peroxide is discussed. Easy cleanup. Demonstration Notes included.
Concepts: Catalysts, exothermic reactions, gases, oxidation–reduction. Time Required: 20 minutes
Chemicals Provided: Sodium iodide solution, hydrogen peroxide solution 30%, and dishwashing liquid detergent.
Note: A large demonstration tray is recommended.
“Magic Genie”—Chemical Demonstration Kit AP2092
Catalog No.
Description
Price/Each
AP2092
“Magic Genie”—Chemical Demonstration Kit
$34.15
Catalog No.
Description
Price/Each
AP6615
Kinetics of a First-Order Reaction— Chemical Demonstration Kit
$30.70
Kinetics of a First-Order Reaction— Chemical Demonstration Kit AP6615
Catalog No.
Description
Price/Each
AP2085
Old Foamey—Chemical Demonstration Kit
$26.80
AP5429
Demonstration Tray, Large
89.50
KINETICS AND REACTION RATE—DEMONSTRATION KITS continued on next page.
Old Foamey— Chemical Demonstration Kit AP2085