IntroductionCommercial 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 ...

IntroductionA seed crystal can be dropped into a saturated solution of sodium acetate. The solution will suddenly crystallize and turn to solid. Alternately, the solution may be slowly poured out onto ...

The sodium/water reaction is a classic, and does have a deeper explanation. Let's start by watching the reaction unfold. The first thing you have to know about sodium is that, ...

When vinegar and baking soda react, they form a compound called sodium acetate. ... To reuse, suspend the bag in boiling water until the sodium acetate reliquefies, then let it cool.