Doktor Klawonn
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Chromatography of marker pens on chalk
Introduction
This is a simple experiment for beginners I use in school. It is very easy to be performed, harmless and produces nice results.
chemicals
- chalk
- marker pens
- Petri dishes
- water
experimental
chalk is painted on using marker pens. Draw around the chalk one cm from its end. You can use multiple colors on one piece of chalk.
An appropriate number of Petri dishes are filled with water.
The prepared pieces of chalk are put into the Petri dishes in an upright manner.
The water will move upwards the chalk and separate the colors.
remarks
The chalk used was made of gypsum. Chalk made of CaCO3 works too. The chalk can be used normally after drying for some days.
links
- This experiment as youtube video
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DDTea
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I really like this. I'm always looking for new, safe, interactive chemistry demonstrations--especially ones that can illustrate important points.
"In the end the proud scientist or philosopher who cannot be bothered to make his thought accessible has no choice but to retire to the heights in
which dwell the Great Misunderstood and the Great Ignored, there to rail in Olympic superiority at the folly of mankind." - Reginald Kapp.
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Sedit
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Its also interesting to note the seperation of simular substances like the placement of the red bands in the red and the middle one(im assuming dark
green?) and the movement of the yellow bands in the blue and the green on on the end.
Knowledge is useless to useless people...
"I see a lot of patterns in our behavior as a nation that parallel a lot of other historical processes. The fall of Rome, the fall of Germany — the
fall of the ruling country, the people who think they can do whatever they want without anybody else's consent. I've seen this story
before."~Maynard James Keenan
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mr.crow
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I like it!
Double, double toil and trouble; Fire burn, and caldron bubble
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