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Product 12592

By: The Flinn Staff

Now You See It—Now You Don’t Oscillating Chemical Reaction Demonstration Kit
chemical demonstration, demonstration, demo
oscillating, oscillate, oscillation
Now You See It—Now You Don’t Oscillating Chemical Reaction Demonstration Kit
chemical demonstration, demonstration, demo
oscillating, oscillate, oscillation
With the Now You See It—Now You Don’t Oscillating Chemical Reaction Demonstration Kit, pretend magical powers cause the color of a solution to alter. The color of the solution will oscillate about every 35 seconds for one-half hour.

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Amaze your students! Pretend you have magical powers that can cause the color of a solution to alter between orange and colorless. Simply add three white solids to a colorless solution and presto—the solution turns orange, then colorless and orange again. The color of the solution will oscillate approximately every 35 seconds for one-half hour or more. A magnetic stirrer is highly recommended. Teacher Demonstration Notes included.

Concepts: Oscillating reactions, reaction mechanisms.
Time Required: 20 minutes
Note: Perform this demonstration in a fume hood or well-ventilated lab.

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Asking questions and defining problems
Developing and using models
Engaging in argument from evidence
Constructing explanations and designing solutions

Disciplinary Core Ideas

MS-PS1.A: Structure and Properties of Matter
MS-PS1.B: Chemical Reactions
HS-PS1.A: Structure and Properties of Matter
HS-PS1.B: Chemical Reactions
HS-PS2.B: Types of Interactions

Crosscutting Concepts

Patterns
Cause and effect
Scale, proportion, and quantity
Stability and change

Performance Expectations

MS-PS1-2. Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.
MS-PS1-5. Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.
HS-PS1-2. Construct and revise an explanation for the outcome of a simple chemical reaction based on the outermost electron states of atoms, trends in the periodic table, and knowledge of the patterns of chemical properties.
HS-PS1-7. Use mathematical representations to support the claim that atoms, and therefore mass, are conserved during a chemical reaction.