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Safe Swimming with Sodium—Chemical Demonstration Kit

By: The Flinn Staff

Item #: AP8916 

Price: $43.03

In Stock.

The Safe Swimming with Sodium Chemical Demonstration Kit is a novel variation of alkali metals reacting with water, which is much safer to perform than the standard sodium demo of dropping a piece of alkali metal into a beaker of water.

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This item can only be shipped to schools, museums and science centers

Product Details

No chemistry class is complete without the spectacular demonstration of alkali metals reacting with water. Safe Swimming with Sodium is a novel variation that is much safer to perform than the standard sodium demonstration of simply dropping a small piece of alkali metal into a beaker of water. In this demonstration, two immiscible liquids, water and mineral oil, are poured into a graduated cylinder. When a small piece of sodium is added to the cylinder, it falls through the top layer of mineral oil and reacts with the water at the interface and is forced back into the mineral oil layer. The density of sodium brings it back down into contact with the water and the process begins again. Sodium pieces are pre-cut for use. Teacher Demonstration Notes included. 

Concepts: Alkali metals, density, immiscible liquids.
Time Required: 15 minutes
Chemicals Provided: Sodium, phenolphthalein, mineral oil.


Materials Included in Kit: 
Mineral oil, light, 500 mL
Phenolphthalein solution, 0.5%, 20 mL
Sodium metal, 7 small pieces

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Developing and using models
Constructing explanations and designing solutions
Engaging in argument from evidence

Disciplinary Core Ideas

MS-PS1.A: Structure and Properties of Matter
MS-PS1.B: Chemical Reactions
MS-PS3.D: Energy in Chemical Processes and Everyday Life
HS-PS1.A: Structure and Properties of Matter
HS-PS1.B: Chemical Reactions
HS-PS3.D: Energy in Chemical Processes

Crosscutting Concepts

Cause and effect
Systems and system models
Energy and matter
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-PS1-1. 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.
HS-PS1-7. Use mathematical representations to support the claim that atoms, and therefore mass, are conserved during a chemical reaction.