Tuesday, September 7, 2010

Lab experiment- sepation techniques.

In this lab experiment, we learnt about separation techniques and its applciations in our daily lives. Adding on the Chromatography experiment, we did evaporation to dryness . Evaporation to dryness is an interesting process. As its name suggests, a solution is evaporated to dryness to get the soluble solute from the solution. For example a salt water is evaporated completely, and its residue would be salt a perhaps a little impurity. I find this process interesting as it is closely linked to Crystallisation which evaporates almost all the solvent till a bit is left. The solution is then left to cool down. Next because there is a small quantity of solvent, satuation point of the solute is reached and thus when the solution is filter, crystals is the residue. Crystallisation can be used to get sugar sucrose from sugar beets. This is a video of evaporation to dryness, enjoy

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