Recreating the Iodine Clock Reaction at Home with Vitamin C | Summary and Q&A

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April 11, 2016
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Recreating the Iodine Clock Reaction at Home with Vitamin C

TL;DR

Create an iodine clock reaction at home using household materials, specifically vitamin C and hydrogen peroxide.

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Questions & Answers

Q: What are the main ingredients required for the iodine clock reaction?

The main ingredients are vitamin C tablets, iodine tincture, cornstarch, hydrogen peroxide, and distilled water.

Q: Why is distilled water used instead of tap water?

Tap water can interfere with the reaction, so it's important to use distilled water to ensure accurate results.

Q: How does the iodine clock reaction work?

The reaction involves the oxidation of iodide ions (I-) by hydrogen peroxide (H2O2), followed by the reduction of the resulting iodine (I2) back to iodide by vitamin C (ascorbic acid). The iodine then reacts with starch to form a blue complex.

Q: Can the color change be accelerated or slowed down?

Yes, the concentration of reactants and the temperature can affect the speed of the color change. Increasing the concentration of iodide or hydrogen peroxide, as well as raising the temperature, will speed up the reaction.

Summary & Key Takeaways

  • The iodine clock reaction involves mixing two colorless solutions that undergo a sudden color change after a certain period of time.

  • Solution A consists of crushed vitamin C tablets dissolved in water, while Solution B is a mixture of cornstarch, hydrogen peroxide, and water.

  • The reaction between Solution A (vitamin C) and Solution B (hydrogen peroxide) results in the formation of a blue complex of triiodide and starch.

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