States, Mixtures + Separation - Chromatography Flashcards
How can chromatography be used
It can be used to separate mixtures and can help identify substances in a compound
What phases does chromatography involve
A stationary phase and a mobile phase
what does separation depend on
The substances attraction to the stationary phase
What is the Rf value
the ratio of distance moved by a substance to the distance moved by the solvent
what is the Rf value equation
distance moved by substance/distance moved by solvent
How can Rf values be used to identify compounds
different compounds have different Rf values
In a mixture the compounds may separate into ………. depending on the solvent
different spots
A pure compound will produce how many spots in all solvents
one
learn how chromatography seperates mixtures
page 16 in cgp
how can chromatography be used to separate pure from impure substances
a pure substance will create one spot, when you perform chromatography on the impure substance more than 1 spot will be created
