The solution will crystallize as it touches the crystal, resulting in an increasingly tall tower of sodium acetate. Mix 175g of NaOAc trihydrate with 50mL distilled water in a very clean 500mL ...

Commercial heat packs (containing iron and water, or supersaturated sodium acetate) and cold packs (various ammonium salts) can be used to show exo- and endothermicity. Heat packs that contain iron ...