A beautiful transformation and a curious conundrum. Watch as Andy turns liquid into solid in a matter of seconds, experimenting with a supersaturated solution of sodium acetate. Click here to subscribe for more science videos: http://bit.ly/RiSubscRibe It just takes one small nudge to spark the transformation of a seemingly stable liquid into a solid. The liquid – a supersaturated solution of sodium acetate – consists of water with more dissolved sodium acetate salt than can be stably sustained. When Andy drops in a salt crystal, he provides the kick needed to start the transformation into the more thermodynamically favourable solid state.