When crystals touch the liquid surface it rapidly starts freezing.
name: The super saturated solution of sodium acetate will crystallize instantly
hot ice (sodium acetate) beautiful science experiment
by mike shin
How to Make Hot Ice - The Complete Guide
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CH3COONa3H2O(melt) → CH3COONa3H2O (solid)
- To perform this experiment you should prepare only one reagent - sodium acetate trihydrate. It is easy to obtain it from acetic acid solution (or vinegar) and sodium bicarbonate (or baking soda).
- Fill the beaker with sodium acetate trihydrate.
- Heat it in a water bath until it melts.
- Cool it down.
- Wait for about half an hour.
- To start freezing add some crystals of solid sodium acetate trihydrate to the supercooled liquid or touch the liquid with a stick.
Sodium acetate trihydrate is a white crystalline solid at room temperature. Its melting point is 58 °C. When sodium acetate trihydrate is heated in a water bath it melts. After this it is cooled down but the substance still exists in a liquid state. This phenomenon is called saturattion. This state is very unstable. When some kind of disturbance is introduced to the system sodium acetate trihydrate rapidly crystallizes and becomes solid.