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Acids, Bases and Indicators
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Acids, Bases and Indicators— Demonstration Kits, continued
Acid–Base Rainbow Fountain—
Chemical Demonstration Kit
Quench your students’ thirst for knowledge with a
fountain of surprises in this guided-inquiry demonstration. The fountain appears to require no energy to run—defying the laws of nature. Marvel as Hero of Alexandria did 1900 years ago when he used air pressure changes and compressed air to lift water. As the solutions flow and mix, a beautiful rainbow of colors emerges. Varying acid and base concentra- tions change pH levels to create new color patterns each time! Use the demonstration multiple times when teaching acid–base chemistry and gas laws. Detailed instructions include student questions and answers. Concepts: Air pressure, vacuum, pH, indicators, neutralization.
Time Required: 15 minutes
Materials Provided: Hydrochloric acid, sodium hydroxide, universal indicator, fountain connector, Beral-type pipets, two 2-L soda bottles, universal indicator chart.
Orange Juice to Strawberry Float—
Chemical Demonstration Kit
By: The Flinn Staff
Change a beaker of “orange juice” into a big, foamy, messy straw- berry float! Simply mix some chemicals together in a beaker, add an acid–base indicator and a colorless solution, and stand back. A huge mountain of foam will erupt out of the beaker. This impressive demon- stration is perfect when discussing the concepts of acids and bases, neutralization reactions and indicators. Demonstration Notes included. Concepts: Acid–base indicators, neutralization.
Time Required: 10 minutes
Chemicals Provided: Sodium bicarbonate, hydrochloric acid solution, methyl orange solution, Alconox® soap.
Note: A large fiberglass demonstration tray (AP5429) is recommended.
See free video at flinnsci.com.
The Designated Driver—
Chemical Demonstration Kit
By: Jim and Julie Ealy, Retired
The Peddie School, Hightstown, NJ
A colorless solution is poured from a large beaker into four smaller beakers producing solutions of “strawberry soda,” “blueberry soda,” “red wine” and “water.” Mixing the resulting solutions from the first three beakers produces “red wine.” The three beakers are refilled with wine and subsequently all four are poured back into the large beaker to produce water. Demonstration Notes included.
Concepts: Acid–base indicators, complex ions.
Time Required: 15 minutes
Chemicals Provided: Phenolphthalein and thymolphthalein indicator solutions, ammonium hydroxide, iron(III) chloride, hydrochloric acid, sodium fluoride solution and potassium thiocyanate solution.
Acid–Base Rainbow Fountain— Chemical Demonstration Kit AP7498
Catalog No.
Description
Price/Each
AP7498
Acid–Base Rainbow Fountain— Chemical Demonstration Kit
$37.60
Catalog No.
Description
Price/Each
AP4778
Orange Juice to Strawberry Float— Chemical Demonstration Kit
$62.05
Orange Juice to Strawberry Float— Chemical Demonstration Kit AP4778
Catalog No.
Description
Price/Each
AP8460
The Designated Driver— Chemical Demonstration Kit
$38.15
ACIDS, BASES AND INDICATORS—DEMONSTRATION KITS continued on next page.
The Designated Driver— Chemical Demonstration Kit AP8460