Witches Cauldron with Dry Ice Fog

Materials: ★★★ Requires materials not commonly found in school laboratories
Difficulty: ★★☆ Can be done by science teachers
Safety: ★★☆ Some safety precautions required to perform safely

Categories: Dry Ice, Special Occasions

Alternative titles: Halloween Dry Ice Fog

Summary

This Halloween demonstration uses dry ice and hot water in a cauldron-like container to produce a bubbling fog effect. The sublimation of dry ice creates dense white clouds that spill over the container’s edges, resembling a witch’s cauldron.

Procedure

  1. Choose a cauldron-style container that can safely hold hot water.
  2. Fill the container about two-thirds full with hot water.
  3. Gradually add small pieces or pellets of dry ice to the water.
  4. Watch as dense fog flows over the sides of the cauldron.
  5. Replace with hot water when it cools, or use a heated soup kettle to maintain temperature.

Spooky Dry Ice Cauldron - Imagination Station Toledo:


The Dry Ice Fog Cauldron by Chillistick | Halloween Ideas and Halloween Decorations 2018 - Chillistick:


📄 Create a Witches’ Cauldron using Halloween dry ice fog - Polar Ice ltd: https://polarice.co.uk/dry-ice-information/applications-of-dry-ice/halloween-dry-ice-fog-special-effects/

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Variations

Safety Precautions

Questions to Consider