B3 Chromatography
Theory
Substances often are mixed with each other and first need to be separated.
There are different ways of separating substances liking filtering, decanting, extracting and many others.
An advanced form of separation is chromatography which utilizes the solubility and adhesion of a substance.
What do you need?
Coffee filters (preferably white), felt pens of different colours, water, cup, scissors
What do you have to do?
Cut a small stripe off a coffee filter. Make small dots in a line rather at the end of the stripe with the felt pens. Put or better hang the coffee filter with the coulored end into a cup or glas.
The setup should now look like in the picture below.
Now add water into the cup until the bottom of the paperstrip dips into the water (the coulored dots should still be above water level).
And now wait. Being patient is an important part of chemistry.
After you have finished your experiments, write the combination of numbers correctly discribing what happened into the solution box:
1: The water doesn't do anything.
2: The water is being "pulled up" into the coffee filter.
3: The coffee filter reacts with the water and starts burning.
4: The process is over after a few seconds.
5: The process is over after a few minutes.
6: The process ist over after a few hours.
7: The water doesn't effect the colours.
8: The water partially separates the colours.
(Example: If 1, 2 and 4 are happening, write 124).