With the Chemistry of Spring Break Demonstration Kit, it’s spring break—time to cast off the winter doldrums and embrace the bright new season. Celebrate the arrival of spring with your students with six fun demonstrations.
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It’s spring break. Time to cast off the winter doldrums and embrace the bright new season! Celebrate the arrival of spring with six fun demonstrations:
• An oscillating chemical reaction alternates between frigid blue and sunny yellow, just like the unpredictable spring weather.
• A rainbow suddenly appears, then just as quickly disappears, when alternating colorless solutions are mixed.
• Shake a yellow solution and the color changes from yellow to red to spring green, the color of new plant growth and one of the prettiest colors of the year.
• Spray a special misting solution on paper flowers and watch them bloom—April showers bring beautiful May flowers!
• A blue flower changes to pink as the weather changes and the humidity rises.
• As spring break approaches, all thoughts turn to... VACATION! Sit back and enjoy a chemical “sunset” on your favorite tropical beach.
Concepts: Oxidation–reduction, acid–base reactions, pH indicators, oscillating reactions, reaction mechanisms, LeChâtelier’s principle, Tyndall effect, colloids.
Time Required: One full class period
Note: Some common laboratory equipment is required but not provided.
Correlation to Next Generation Science Standards (NGSS)
Science & Engineering Practices
Constructing explanations and designing solutions
Disciplinary Core Ideas
MS-PS1.B: Chemical Reactions
HS-PS1.B: Chemical Reactions
HS-PS3.D: Energy in Chemical Processes
Stability and change
Energy and matter
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-PS1-4: Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.
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.