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Product 12594

By: Jim and Julie Ealy, Retired , The Peddie School, Hightstown, NJ

The Effervescent Oscillator Chemical Demonstration Kit is unique, where the oscillations are between the generation and cessation of gas bubbles. Students watch the solution effervesce, the bubbling decreasing and then increasing again.

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Product Details

Oscillating reactions typically involve eye-catching color changes, but heres a unique one where the oscillations are between the generation and cessation of gas bubbles. A colorless solution will effervesce intensely and then the bubbling will decrease and then increase again. The oscillations will continue for several minutes. Teacher Demonstration Notes included.

Concepts: Oscillating reactions, supersaturation, exothermic reactions.
Time Required: 15 minutes
Chemicals Provided: Acidified ammonium sulfate solution and sodium nitrite solution.

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Engaging in argument from evidence
Obtaining, evaluation, and communicating information

Disciplinary Core Ideas

MS-PS1.B: Chemical Reactions
HS-PS1.B: Chemical Reactions

Crosscutting Concepts

Cause and effect
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-PS1-4. Develop a model that predicts and describes changes in particle motion, temperature, and state of a pure substance when thermal energy is added or removed.
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.