short writing 23

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There are two videos to watch on YouTube:

1. Paper Chromatography (2:45) Mr. Pauller

separation of wet erase marker ink pigments

2. Paper Cromatography Experiment ( 6:38) Thomas TK

separation of plant pigments

Your assignment is to describe this technique in a short essay style report.

You should list the materials and equipment used in paper chromatography

and discuss the methods including things not to do which yields very poor

results. Diagrams may be used in your report.

Discuss each video: how many pigments appear to be present in the black marker

used in this video.

How many plant pigments were revealed by paper chromatography in video #2?

What is the rf?

When was chromatography invented? And by whom?

What is the mobile phase?

What is the stationary phase?

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