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Product 12671

By: Patti Duncan, High Point Regional High School, Sussex, NJ

The Keep Your Eye on the Ions Double Replacement Model Demonstration Kit is a powerful visual analogy for a common chemical reaction for use in the laboratory. Students will study key concepts of a double replacement reaction.

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Do it again! This is what your students will say once they have seen the key concepts of a double replacement reaction. Water soluble paper “bonds” hold the starting molecules together. When the molecules are placed in water, the bonds break and “ionization” occurs. Some of the ions bond (magnetic attractions) and form insoluble molecules that precipitate (sink) to the bottom of the beaker. Other “soluble” ions (nonmagnetic) continue to float around in solution. A very powerful visual analogy for a common chemical reaction that you will want to include in your arsenal of demonstrations.  

Concepts: Double replacement reactions, solubility.
Time Required: 15 minutes


Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Analyzing and interpreting data

Disciplinary Core Ideas

HS-PS1.B: Chemical Reactions
HS-PS1.A: Structure and Properties of Matter

Crosscutting Concepts

Energy and matter

Performance Expectations

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.