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Flinn Lab Activities and Demonstrations
1-800-452-1261
flinnsci.com
Indicator Sponge—
A Discrepant Event Chemical Demonstration Kit AP6160
Organic Rainbow—Chemical Demonstration Kit AP6433
Goldenrod Paper—Chemical Demonstration Kit AP9868
ACIDS, BASES AND INDICATORS—DEMONSTRATION KITS continued on next page.
Acids, Bases and Indicators— Demonstration Kits, continued
Indicator Sponge—A Discrepant Event
Chemical Demonstration Kit
By: The Flinn Staff
Dip a red sponge into a red solution—watch it turn blue. Place the blue sponge into a blue solution—it turns back to red. How? Capture students’ attention and challenge their observation and prediction skills. Makes a great safety demonstration—check who didn’t clean up spilled acid by wiping the benchtop with your magical sponge. Demonstration Notes included. Concepts: Acid–base indicators.
Time Required: 15 minutes
Materials Provided: Hydrochloric acid solution, sodium hydroxide solution, red and blue food dye, indicator sponge.
See free video at flinnsci.com.
Organic Rainbow—
Chemical Demonstration Kit
By: Penney Sconzo, Westminster Academy, Atlanta, GA
Uses universal indicator to vividly display the hydrolysis reaction of tert-butyl chloride. The reaction produces acid that is slowly consumed by a clear base solution—gradually increasing the pH to show the rainbow colors of the indicator. Once the base is fully depleted, acid concentration builds up again, reversing the color change back to red. Students record observations and form conclusions about the reaction. Demonstration Notes included. A 500-mL graduated or hydrometer cylinder is required and available separately.
Concepts: Organic chemistry, hydrolysis, indicators.
Time Required: 15 minutes
Materials Provided: Acetone, tert-butyl chloride, universal indicator, sodium hydroxide solution, Beral-type pipets.
Goldenrod Paper—
Chemical Demonstration Kit
By: The Flinn Staff
A beautiful demonstration to introduce students to acid–base indica- tors. The dye in this special goldenrod paper acts as an acid–base indicator. When the paper comes in contact with a base, it changes from goldenrod to a dark red. Write hidden messages, splash fake blood or amaze your students. Instructions describe what bases to use and how to perform the demonstration so the paper is reusable. The best part is that carbon dioxide in the air will slowly change the red color back to goldenrod—just in time for your next class!
Concepts: Acid–base indicators, equilibrium.
Time Required: 15 minutes
Materials Provided: 100 sheets of reusable goldenrod paper.
Catalog No.
Description
Price/Each
AP6160
Indicator Sponge—A Discrepant Event Chemical Demonstration Kit
$25.95
Catalog No.
Description
Price/Each
AP6433
Organic Rainbow—Chemical Demonstration Kit
$32.85
AP8599
Hydrometer Cylinder, Glass
41.45
Catalog No.
Description
Price/Each
AP9868
Goldenrod Paper—Chemical Demonstration Kit
$16.95
AP9869
Goldenrod Paper, Ream of 500 Pieces
84.75
Light Up Your Demonstrations!
Illuminate your demonstrations using the Flinn Light Box.
Constructed of 3⁄4" plywood with a cool 20-watt fluo-
rescent light bulb power cord and switch, and sturdy acrylic viewing screen 27"W x 6"H x 8"D.
Catalog No.
Description
Price/Each
AP8626
Light Box, Flinn
$126.35