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Flinn Lab Activities and Demonstrations
1-800-452-1261
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Chemical Reactions—Demonstration Kits,
continued
The Chemistry of Spring Break— Multi-Demonstration Kit
By: The Flinn Staff
It’s spring break. Time to cast off the winter doldrums and embrace the bright new season! Celebrate the arrival of spring with six fun demonstrations:
• An oscillating chemical reaction alternates between frigid blue and sunny yellow, just like the unpredictable spring weather.
• A rainbow suddenly appears, then just as quickly disappears, when alternating colorless solutions are mixed.
• Shake a yellow solution and the color changes from yellow to red to spring green, the color of new plant growth and one of the prettiest colors of the year.
• Spray a special misting solution on paper flowers and watch them bloom—April showers bring beautiful May flowers!
• A blue flower changes to pink as the weather changes and the humid- ity rises.
• As spring break approaches, all thoughts turn to...VACATION! Sit back and enjoy a chemical “sunset” on your favorite tropical beach. Concepts: Oxidation–reduction, acid–base reactions, pH indicators,
oscillating reactions, reaction mechanisms, LeChâtelier’s principle, Tyndall effect, colloids.
Time Required: One full class period
Chemicals Provided: Hydrogen peroxide solution, potassium iodate solution, starch–malonic acid–manganese(II) sulfate solution, sodium hydroxide solution, rainbow indicator solution, hydrochloric acid solution, dextrose solution, indigo carmine, ammonia solution, phenol- phthalein solution, thymolphthalein solution, universal indicator, cobalt chloride solution, sodium thiosulfate solution.
Note: Some common laboratory equipment is required but not provided.
Catalog No.
Description
Price/Each
AP6603
The Chemistry of Spring Break— Multi-Demonstration Kit
$127.90
The Chemistry of Spring Break— Multi-Demonstration Kit AP6603
End of Year Finale—
Multi-Demonstration Kit
By: The Flinn Staff
Put an exclamation point on your year-end review of chemistry concepts with this electric, entertaining, patriotic set of five demonstrations!
• Passing electric current through a solution produces streaks of silver
crystals that reverse course when the polarity is switched.
• Mix milk of magnesia with universal indicator and observe a colorful show when the antacid dissolves in simulated stomach acid.
• Take two rusty iron balls, wrap one in aluminum foil, then bang them together and observe the fireworks in this safe variation of the classic thermit reaction.
• Mix three sets of two colorless solutions and, in 30 seconds, the solu- tions flash red, white and blue in a tribute to the grand old flag.
• Add a pale solution to Uncle Sam’s topper, then hold on to your own hat as red, white and blue foam erupts from the stars and stripes– adorned stovepipe.
Concepts: Oxidation–reduction, electrolysis, pH indicators, acid–base neutralization, activation energy, exothermic reactions, buffers, solubil- ity and equilibrium, clock reactions, catalyst, decomposition reactions. Time Required: One full class period
Materials Provided: Hydrogen peroxide solution, hydrochloric acid solution, sodium sulfite, sodium bisulfite, sodium iodide solution, universal indicator solution, thymolphthalein solution, phenolphthalein solution, soap solution, magnesium chloride solution, milk of magnesia, formaldehyde solution, tin(II) chloride solution, blue and red food dyes, 9 V battery, aluminum foil, iron balls, plastic vials, Petri dish.
Note: Common laboratory glassware and equipment are required but not provided.
Catalog No.
Description
Price/Each
AP7166
End of the Year Finale—Multi-Demonstration Kit
$106.90
End of the Year Finale—Multi-Demonstration Kit AP7166
CHEMICAL REACTIONS—DEMONSTRATION KITS continued on next page.