Instant Crystals with Sodium Acetate Hot Ice

This is the experiment that stops people in their tracks. A clear liquid that looks exactly like water until you touch it with a single crystal and watch it solidify in an instant, generating enough heat to feel warm in your bare hands. Sodium acetate hot ice is the same chemistry inside every commercial reusable hand warmer, brought to life in your own kitchen. Pour it onto a plate and grow a crystal tower in real time. Reheat it and do it all over again. This kit is endlessly reusable. Equal parts magic trick and college-level thermodynamics, hot ice is the perfect introduction to supersaturation, exothermic reactions, and the hidden energy stored in everyday molecules.

What's Included

• Sodium acetate trihydrate 80g
• Microwave-safe beaker
• Stirring rod
  
• Nitrile gloves × 2 pairs
• Safety goggles × 2 pairs
• Full-color printed worksheet

Curriculum Connections

• NGSS MS-PS3-4 / HS-PS3-1 — Energy in chemical processes
• AP Chemistry Unit 6 — Thermodynamics
• IB Chemistry Topic 5 — Energetics
• Real-world: reusable hand warmers, heat packs, physical therapy

Waste Disposal