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Vanishing Valentine—Chemical Demonstration Kit

By: Mike Shaw, West Stokes High School, King, NC

Item #: AP5929 

Price: $23.87

In Stock.

The Vanishing Valentine Chemical Demonstration Kit is a lovely approach to introduce students to oxidation–reduction reactions. Students watch their Valentine vanish and then reappear with this favorite holiday demonstration.

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

Product Details

Watch your valentine vanish and then reappear with this favorite holiday demonstration! Simply shake a flask containing a colorless solution to introduce oxygen. The solution will change to a bright pink valentine color. Then allow the solution to sit undisturbed, and observe as the solution fades back to colorless. The oxidation–reduction cycle can be repeated many times. Teacher Demonstration Notes included. 

Concepts: Oxidation–reduction, indicators.
Time Required: 15 minutes


Materials Included in Kit: 
Dextrose solution, 0.13 M, 700 mL
Resazurin solution, 1%, 10 mL
Sodium hydroxide solution, 1 M, 700 mL

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Analyzing and interpreting data
Constructing explanations and designing solutions

Disciplinary Core Ideas

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

Crosscutting Concepts


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.
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.