Paper Chromatography

Question	Answer
Chromatography	Method used to separate substances in a mixture. Can be then used to identify substances.
Mobile Phase	Where molecules can move. This is always in a liquid or a gas,
Stationary Phase	Where molecules can't move. This can be in a solid or really thick liquid.
What happens in chromatography?	1. filter paper stationary phases 2. draw a pencil line 1cm from the bottom 3. sample of the unknown substance is spotted 3. filter paper placed in a small amount of solvent 4. solvents the mobile phase 5. components of the mixture dissolve in the solvent and travel up the filter paper 6.the resulting pattern is called the chromatogram 7. dyes move up the paper separate and create series of blogs
what 2 things affects the amount of time the molecules spend in each phase?	1. solubility in the solvent 2. attraction to the paper
What is a Rf value?	The travelled distance by the dissolved substance divided by the distance travelled by the solvent. Image: Rf Value (binary/octet-stream)

Resource summary

	Created by Andiswa Ndlovu over 8 years ago