Steel wool, the fine, soft steel strands commonly used as an abrasive for polishing wood, can react vigorously with 3% household hydrogen peroxide. While both materials are readily available at most supermarkets, the reaction only occurs under the right conditions and may require a small catalyst to initiate.
What You Need
- Uncoated steel wool (avoid any oil or protective film)
- 3% hydrogen peroxide (household grade)
- Table salt (for conductivity)
- Water and mild soap (for cleaning)
- Safety gear: gloves, goggles, and a well‑ventilated area
Safety Precautions
Even though the reaction is largely harmless, the rapid bubbling can cause splashes. Always wear protective gloves and goggles, and conduct the experiment in a well‑ventilated space or outdoors.
Procedure
- Clean the steel wool. Rinse it with soapy water to remove any unseen oil or coating, then dry thoroughly. This ensures the iron surface is ready for reaction.
- Prepare the peroxide solution. In a clear container, add 3% hydrogen peroxide. Stir in a small pinch of table salt to increase the solution’s electrical conductivity.
- Introduce the steel wool. Gently place the cleaned wool into the peroxide mixture. You should observe immediate bubbling and the formation of rust-colored sediment.
- Observe the reaction. The vigorous effervescence indicates that the iron in the steel wool is donating electrons to the hydrogen peroxide, a process that generates oxygen gas and iron oxides.
- Cleanup. Once the reaction has subsided, dispose of the mixture safely by diluting it with plenty of water before pouring it down the drain.
When executed correctly, the reaction produces a visible burst of bubbles and rust, demonstrating a classic example of a redox process.
