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W09 Distilled water made of Cola

* Left: Keep 20 ml of Cola in a big 50-ml infusion bottle until no more bubbles can be seen.
* Close it by a stopper pierced by a plastic pipette tip which is connected with a transfusion tubing.
* Connect this tubing with a Liquemin bottle cooled by water. * The bottles are fixed to each other by a wire.
* The bottle with Cola is heated on an electric hot plate. Observations (middle): The liquid boils. Vapour condenses in the tubing.
* A colourless, transparent liquid collects in the Heparin vial.
* Right: At the side of the tubing a digital thermometer is placed inside the big stopper.
* The vapour leaving the left bottle has a temperature of 100°C. Water boils at 100°C.
   At the same temperature it condenses during cooling. The liquid is distilled water.