Page 105 - Demo

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Gases and the Gas Laws
103
Gases and the Gas Laws—Demonstration Kits,
continued
Gas Laws Apparatus
PV = nRT. High-quality apparatus demonstrates the relationship between pressure, volume and temperature of a gas. Place the valve into the open position and turn the hand crank to fill the cylinder with air to the desired volume. Then close the valve and increase or decrease the volume in the cylinder. The pressure gauge immediately shows how the pressure increases as the volume decreases and vice versa. A digital thermometer displays how the temperature changes. One AA battery is required and available separately. Heavy-duty metal base. 61⁄4" L x 41⁄2" W x 8" H.
Generating and Detecting Ozone—
Chemical Demonstration Kit
By: The Flinn Staff
Ozone and oxygen are allotropes of oxygen and related molecules, but they have very different properties. Investigate the formation and prop- erties of ozone with this novel, small-scale gas-generating kit. Ozone is produced as a byproduct of the electrolysis of sulfuric acid solution. A special modified transfer pipet serves as both the reaction vessel and delivery tube for the ozone. The reactions of ozone with unsaturated organic compounds are illustrated in a series of special effects. Watch as ozone causes a balloon to burst, a rubber band to snap, and decolorizes food dyes and pigments. A very topical demonstration that highlights ozone’s unique role in environmental chemistry!
Concepts: Electrolysis, oxidation–reduction, properties of ozone. Time Required: 30 minutes
Materials Provided: Sulfuric acid solution, dyes, platinum wire, rubber bands, syringe, pipets, alligator clip leads, balloons.
Note: Perform this demonstration in a fume hood or well-ventilated lab.
Kinetic Molecular Theory—
Multi-Demonstration Kit
By: The Flinn Staff
The kinetic molecular theory may be summarized in one simple phrase—molecules in motion! The demonstrations in this kit provide visual evidence for this important concept. Visualizing molecules in motion helps students understand and compare the kinetic and potential energy of molecules in the solid, liquid and gas phases.
Set of three demonstrations includes:
• Instant Hot Air Balloon—What forces allow a hot air balloon to rise
and stay aloft? Build and launch a mini hot air balloon to discover how
temperature affects the motion of molecules and the flight of a balloon.
• Pink Panther Breath—Investigate the diffusion of gas molecules as pink swirls appear when ammonia gas dissolves in a phenolphthalein
solution.
• MolecularMotionDemonstrator—Howdoesthemovementofmolecules
in solids, liquids and gases vary? Use a model to compare the arrange-
ment of molecules and their relative motion in different states of matter. Concepts: Conservation of mass, density, gas laws, kinetic molecular theory, gas diffusion.
Time Required: 45 minutes total for all demonstrations
Chemicals Provided: Ammonium hydroxide solution, phenolphthalein solution, copper shot, balloons, cups, twist ties, string, gas collecting bottles, filter paper, pipets, Molecular Motion Demonstrator.
Gas Laws Apparatus AP7822
Catalog No.
Description
Price/Each
AP7822
Gas Laws Apparatus
$97.10
Catalog No.
Description
Price/Each
AP7249
Generating and Detecting Ozone— Chemical Demonstration Kit
$57.90
Generating and Detecting Ozone—Chemical Demonstration Kit AP7249
Catalog No.
Description
Price/Each
AP7359
Kinetic Molecular Theory— Multi-Demonstration Kit
$69.40
Kinetic Molecular Theory—Multi-Demonstration Kit AP7359