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Seeing the Invisible—Chemical Demonstration Kit

By: Jesse Bernstein, Miami Country Day School, Miami, FL

Item #: AP7046 

Price: $41.02

In Stock.

The Seeing the Invisible Properties of Gases Demonstration Kit shows the fluid nature of gases. Carbon dioxide is denser than air, therefore it flows down a ramp of candles, displacing the air above it, extinguishing the candles' flames.

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Product Details

Is it possible to pour a gas? Set up the specially designed ramp with equally spaced candles. Add a clear liquid to the beaker, hold the beaker at the top of the ramp, and pour the invisible contents. One by one the candles are snuffed out! The beaker contains sodium bicarbonate. Add vinegar to the beaker and carbon dioxide is produced. Carbon dioxide is denser than air and therefore the carbon dioxide flows down the ramp, displacing the air above each candle and extinguishes the flame. A dramatic demo showing the fluid nature of gases. Teacher Demonstration Notes included. Enough materials are provided to perform the demonstration seven times. Concepts: Buoyancy, gas density. Time Required: 15 minutes Materials Provided: Sodium bicarbonate, vinegar, plastic ramp, and tea candles.


Materials Included in Kit: 
Acetic acid solution, 1 M, 750 mL
Baking soda, 100 g
Clay, terra cotta, ¼ lb pkg
Unscented tea light, white, 10
U-shaped PETG tube, 30"

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Constructing explanations and designing solutions

Disciplinary Core Ideas

MS-PS1.A: Structure and Properties of Matter
HS-PS1.A: Structure and Properties of Matter

Crosscutting Concepts

Structure and function