Lesson on August 16 2010

Today we experimented on Chromatography and also, we were taught on distillation.
3-2-1

3thoughts/ideas:
-Distillation is a physical method used to separate a mixtures into its constituent elements/compounds. It is used to only separate a liquid mixture, or dissolved substances.
-Chromatography is another physical method to separate mixtures. Only a small drop of sample is needed to find out the constituent substances.
-There must be a solvent put into a boiling tube, then the filter paper that has the drop of sample will be put into the boiling tube, but the drop of sample has to be above the solvent, then a stopper will be used to prevent the solvent from evaporating. In a short while, the drop of sample will be separated into different colours.

2Questions:
-What will happened if a large amount of sample is used for just a small piece of filter paper?
-Can the round-bottomed flask originally used in a distillation experiment that contains the mixture be changed to a boiling tube?

1Useful Applications:
-Chromatography is used in a lab for forensics.