The complete guide to making hot ice and sodium acetate. How to create it, fix it, and use it. All methods from baking soda and vinegar to laboratory synthesis are shown. A full article on this video can be found at: sites.google.com The basis for hot ice is sodium acetate trihydrate, which is heated above its melting point and then cooled below its melting point so it’s supercooled. It’s still liquid and quickly solidifies when a seed crystal is introduced. You cannot use copper pots because the vinegar seems to dissolve copper upon boiling, contaminating your product and damaging your pot.