How To: Make water rapidly crystallize

A seed crystal is dropped into an unstable supersaturated solution of sodium acetate NaC2H3O2 and it completely crystallized in front of your eyes. This demonstration is prepared by heating 700 grams of sodium
acetate in 50mL of water in a flask until all the solid dissolves. The solution is then cooled back to room temperature. Drop a seed crystal and see the very cool results.