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What factors determine the speed at which molecules move along the chromatography paper
Solubility and polarity
Do polar solutes travel faster or slower than non-polar solutes and why
Slower because it sticks to the surface due to exposed -OH groups making the surface polar, and therefore forming H bond with the molecules
What do you use for colourless molecules
UV light
Ninhydrin (makes amino acids brown visible spots)
Iodine
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