How to set up a safe camphor sublimation demo in class

Setting up a safe camphor sublimation demo involves using appropriate equipment, ensuring proper ventilation, and following safety guidelines.

When performing a camphor sublimation experiment in a classroom setting, safety is paramount. Here's a step-by-step guide to ensure a smooth and secure demonstration.

Step-by-Step Setup:

• Gather Necessary Equipment:

  • Camphor (solid form)

  • A heat source (Bunsen burner or alcohol lamp)

  • A glass beaker or evaporating dish

  • A watch glass or an inverted funnel to collect vapors

  • Tongs or forceps for handling the hot camphor

  • A balance to measure the mass of camphor before and after the experiment

  • A thermometer to monitor the temperature

• Set Up the Apparatus:

  1. Place the camphor in the center of the glass beaker or evaporating dish.

  2. Position the heat source beneath the beaker or dish, ensuring it can safely heat the camphor.

  3. Place the watch glass or inverted funnel on top of the beaker to collect the camphor vapors as they sublimate.

  4. Ensure the room is well-ventilated to disperse the camphor vapors.

• Perform the Experiment:

  1. Light the heat source and gently heat the camphor.

  2. As the camphor heats up, it will change directly from a solid to a vapor without becoming liquid (sublimation).

  3. The watch glass or funnel will collect the vapors, which will eventually condense back into solid camphor.

Important Safety Tips:

• Proper Ventilation: Always perform the experiment in a well-ventilated area to prevent inhalation of vapors.

• Wear Protective Gear: Use safety goggles, gloves, and a lab coat to protect against accidental burns and exposure.

• Use a Stable Heat Source: Ensure that the heat source is stable and controlled to avoid overheating or accidents.

Setting up a safe camphor sublimation demo requires careful preparation and safety precautions. Following these steps ensures the experiment is both educational and safe for everyone in the classroom.