dry ice bubbles

Molecular science meets sci-fi fun!

Molecular science meets sci-fi fun!

When you drop a piece of dry ice in a bowl of water, the gas that you see is a combination of carbon dioxide and water vapor. See what happens when you add dish soap to the equation with this fun STEM experiment.

Dry Ice Bubbles

Ingredients:

  • 3 feet of rubber tubing
  • dish soap
  • plastic funnel
  • 2-liter size plastic bottle
  • scissors
  • dry ice
  • water
  • tape
  • plastic spoon

Directions:

  • Fill a medium sized glass bowl halfway with room-temperature water.
  • Add dish soap to the water and mix thoroughly with plastic spoon. Set bowl aside.
  • Connect the plastic tubing to the plastic funnel. Secure well with tape. Set aside.
  • Ask an adult to help cut the plastic bottle in half and place dry ice in the bottom half of the plastic bottle. Be sure to use a pair of leather gloves to protect your hands against the cold temperature of the dry ice.
  • Pour water over the dry ice and watch the mixture start to smoke.
  • Cap the funnel over the plastic bottle filled with dry ice. The smoke will now start to flow through the plastic tubing.
  • Place the open end of the tubing into the dish soap mixture and watch the bubbles rise!

Safety:

  • Use dry ice only with adult supervision.
  • Dry ice must be handled using heavy gloves or tongs. It will cause severe burns if it comes in contact with bare or unprotected skin.
  • Always wear safety goggles when handling dry ice. The debris and shards are extremely dangerous to your eyes.
  • Never put dry ice in your mouth.
  • Never store dry ice in an airtight container. As the dry ice sublimates, gas pressure will build and the container will explode. Make sure your container is ventilated or has a loose-fitting lid.
  • Do not store dry ice in your freezer. It will cause your freezer to become too cold and the freezer may shut off.
  • In the unlikely event of a dry ice burn, treat it the same as you would a heat burn. See a doctor if the skin blisters or comes off. Apply antibiotic ointment to prevent infection and bandage mild burns.