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Crystal Growing Rock—Chemical Demonstration Kit

By: The Flinn Staff

Item #: AP8715

Price: $27.10

In Stock.

The Crystal Growing Rock Chemical Demonstration Kit is an effective and fun way to introduce the topics of crystals, chemical reactions and the effect of acids on carbonates. Using limestone and acetic acid, crystal growth is examined.

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Product Details

Amazing! Beautiful popcorn-like crystals actually growing out of a rock. How is this possible? In this demonstration, the teacher performs tests on a limestone rock to determine some of its chemical and physical properties. The rock is then placed in a dish of acetic acid solution and left undisturbed for several days. Watch as puffy crystals slowly appear to sprout from inside the rock! When enough crystals have grown, they are removed and tests are performed. Students record their observations and determine from the data whether the new crystals are the result of a chemical reaction. This demonstration is an effective and fun way to introduce the topics of crystals, chemical reactions and the effect of acids on carbonates. Teacher demonstration notes, along with reproducible student worksheets, are included.

Concepts: Crystal formation, chemical reactions, properties of acids.
Time Required: 2 class periods, 10 minutes each. Rock crystals grow in about five days.
Note: Some common household items and laboratory equipment are required but not provided.


Materials Included in Kit: 
Acetic acid vinegar solution, 300 mL
Acetic acid vinegar, 500 mL, 2
Calcium carbonate, 25 g
Growing rock
Lithium chloride, 7 g
Weighing dish, disposable, 5.5 g, 5½" x 5½", 7
Wood splints, pkg/30

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Asking questions and defining problems
Planning and carrying out investigations
Analyzing and interpreting data
Constructing explanations and designing solutions
Obtaining, evaluation, and communicating information
Engaging in argument from evidence

Disciplinary Core Ideas

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

Crosscutting Concepts

Energy and matter
Systems and system models
Cause and effect

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-PS1-1. Develop models to describe the atomic composition of simple molecules and extended structures.
HS-PS1-1. Use the periodic table as a model to predict the relative properties of elements based on the patterns of electrons in the outermost energy level of atoms.
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.