Page 74 - Demo

72
Flinn Lab Activities and Demonstrations
1-800-452-1261
flinnsci.com
Chemical Reactions—Demonstration Kits,
continued
Identifying Chemical Reactions— Multi-Demonstration Kit
By: The Flinn Staff
Review the different types of chemical reactions and help your students succeed using this colorful collection of five demonstrations.
• Combination Reaction—Adding water to calcium oxide produces calcium hydroxide, along with enough heat to fry an egg!
• Decomposition Reaction—Fill a Petri dish with salt and universal indicator solution, attach alligator clips and a battery, and observe a rainbow of color changes as the water molecules split apart.
• Single Replacement Reaction—Aluminum dissolves and copper metal precipitates when aluminum foil is placed in a solution of copper(II) chloride.
• Double Replacement Reaction—Mixing copper(II) chloride and sodium phosphate produces a beautiful green precipitate.
• Combustion Reaction—Add a little isopropyl alcohol to a 2-L soda bottle, ignite the vapors, and “whoosh”! The combustion of isopropyl alcohol and oxygen produces a rush of gases and a spectacular blue flame. Use the demonstrations singly as a way to introduce each new topic,
or perform all the demonstrations together as a review of reaction types. Concepts: Combination reaction, combustion, decomposition, electrol- ysis, exothermic reaction, oxidation-reduction, precipitation reaction, single and double replacement.
Time Required: One full class period
Materials Provided: Aluminum foil, calcium oxide, copper(II) chlo- ride solution, isopropyl alcohol, sodium chloride/universal indicator solution, sodium phosphate solution, 9-V battery, battery leads with alligator clips, and seven disposable Petri dishes.
Note: Common laboratory equipment is required, but not provided.
Carbon Snake—
Chemical Demonstration Kit
By: The Flinn Staff
Watch how your students react as they see the carbon come out of the sand and simulate a snake; it grows and grows! With disbelief they will ask, where is it coming from? How is it possible? You will be able to explain the decomposition of chemicals when exposed to flames in the presence of oxygen. A perfect example of an exothermic reaction, and chemical change.
Old Glory—Chemical Demonstration Kit
By: The Flinn Staff
Place three clear and colorless solutions all in a row,
play some patriotic march music in the background, and add a single yellow solution to each beaker. Cheers, cheers for the red, white, and blue—the colors of Old Glory emerge in time to the music! Introduce your students to the nature of chemical reactions with this color- ful chemical demonstration kit. What kinds of observations provide evidence that a chemical reaction has occurred? The vivid colors in this demonstration will leave a lasting impression as students learn about double replacement reactions and complex ion formation. Demonstration Notes included.
Concepts: Chemical reactions, double replacement, and complex ions. Time Required: 10 minutes
Chemicals Provided: Iron(III) chloride solution, potassium ferrocya- nide solution, potassium thiocyanate solution, and silver nitrate solution.
Identifying Chemical Reactions—Multi-Demonstration Kit AP6604
Catalog No.
Description
Price/Each
AP6604
Identifying Chemical Reactions— Multi-Demonstration Kit
$77.65
Carbon Snake—Chemical Demonstration Kit AP9584
Catalog No.
Description
Price/Each
AP9584
Carbon Snake—Chemical Demonstration Kit
$23.60
CHEMICAL REACTIONS—DEMONSTRATION KITS continued on next page.
Old Glory—Chemical Demonstration Kit AP8463
Catalog No.
Description
Price/Each
AP8463
Old Glory—Chemical Demonstration Kit
$25.05