Demonstration Procedures

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The Nonburning Towel

Materials

  • 50 ml Isopropanol Alcohol
  • 50ml distilled water
  • 1 liter beaker
  • cloth towel (approx. 20 cm x 40 cm)
  • Bunsen Burner
  • Tongs

Procedure

  1. Mix equal ammounts of water and alcohol in a beaker.
  2. Immerse the dry towel in the alcohol-water mixture and thoroughly wet the towel.
  3. Squeeze the towel to remove excess liquid.
  4. Light the burner.
  5. Hold the center of the towel with crucible tongs.
  6. Keeping the towel at arms length, move it into the center of the flame and allow it to catch on fire.
  7. Continue to hold the flaming towel at arms length to minimize any chance of burns.
  8. As the Flame subsides, snuff it out with a quick jerk to avoid catching the towel on fire.

Hazards

Wear safety glasses and a labcoat!

To avoid burns, the flaming towel must be handled with care. Combustable material must be removed from the vicinity, and a fire extinguisher should be available.

Isopropyl alcohol can damage the eyes severely.