Recreating the chemical traffic light reaction | Summary and Q&A

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December 19, 2018
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NileRed
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Recreating the chemical traffic light reaction

TL;DR

This video explains the chemical traffic light reaction, a demonstration of oxidation and reduction in a sealed container that changes colors when shaken.

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Questions & Answers

Q: What are the ingredients needed for the chemical traffic light reaction?

The ingredients include glucose, sodium hydroxide drain cleaner, and indigo carmine dye.

Q: What causes the color changes in the reaction?

The color changes are a result of the interaction between the reducing properties of glucose, the pH of the solution, and the oxidation and reduction of the indigo carmine dye.

Q: How does shaking the solution change the color from red to green?

Shaking introduces oxygen into the solution, allowing the indigo carmine dye to be re-oxidized back to its blue form, resulting in a color change from red to green.

Q: Can the color change process be repeated multiple times?

Yes, the process can be repeated several times by shaking the solution to trigger the oxidation and reduction reactions of the indigo carmine dye.

Summary & Key Takeaways

  • The chemical traffic light reaction involves a simple mixture of glucose, sodium hydroxide drain cleaner, and indigo carmine dye to create a color-changing reaction.

  • The reaction starts with a blue solution, which turns green when shaken, then transitions to yellow when left undisturbed. Shaking it again can repeat the color change process several times.

  • The reaction involves chemical oxidation and reduction, with the glucose acting as a reducing agent and the indigo carmine dye changing colors based on pH and oxidation state.

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