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Colorful Electrolysis—Chemical Demonstration Kit

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

Item #: AP6467 

Price: $29.42

In Stock.

With the Colorful Electrolysis Oxidation–Reduction Chemical Demonstration Kit, present electrolysis in a very colorful and dramatic way on an overhead projector.

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

Product Details

Demonstrate simple electrolysis in a very colorful and dramatic way on your overhead projector. A 9V battery supplies the power and universal indicator provides the color show. As electrolysis occurs in the Petri dish, the pH changes at the anode and cathode are different. The solution around the cathode immediately turns purple as hydrogen gas bubbles are formed. At the anode, oxygen is produced and the solution turns orange/red in color. Across the entire Petri dish the entire spectrum of universal color changes occur reflecting the pH continuum created in the Petri dish. Teacher Demonstration Notes are included.

Concepts: Electrolysis, pH.
Time Required: 15 minutes


Materials Included in Kit: 
Sodium sulfate solution, 0.5 M, 500 mL
Universal indicator solution, 100 mL
Alkaline battery, 9 V
Battery clip with alligator clip leads
Culture (petri) dish, 90 x 15 mm
Pencil leads, 0.7 mm, tube of 12

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Developing and using models

Disciplinary Core Ideas

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

Crosscutting Concepts

Cause and effect
Stability and change
Systems and system models

Performance Expectations

MS-PS1-6: Undertake a design project to construct, test, and modify a device that either releases or absorbs thermal energy by chemical processes.
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.