chromatography Flashcards

1
Q

how does the ink travel up the chromatography paper?

A

by capillary action

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2
Q

what is the mobile phase?

A

the solvent which is used to distinguish the colours in an impure substance in chromatography

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3
Q

what is the stationary phase?

A

the chromatography paper itself

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4
Q

what is the retention factor used for and how?

A

finding out unknown substances as it can be compared with other Rf substances (reference values)

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5
Q

what is the equation for retention factor?

A

distance moved by solvent

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6
Q

what will pure substances produce on the chromatography paper?

A

one dot of a single colour

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7
Q

what will happen to substances which are more soluble?

A

they will travel further up the page because they spend more time on the mobile phase and thus are carried further up the paper than less soluble components

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