paper chromatography - chemisrty

Question 1

why do we NOT use a pen when we are drawing the baseline?

Answer 1

pen is insoluble which means it won’t dissolve in the water

Question 2

what are the two cautions we take when we are doing the experiment?
why?

Answer 2

make sure you place a lid on top so the solvent doesn’t evaporate
make sure the solvent is shallow so that the ink doesn’t dissolve

Question 3

describe the process by which chromatography happens.

Answer 3

the solvent seeps up the filter paper with the ink
there is then a separation of the substances
each ink moves 1 up the filter paper at a different rate
any of the insoluble ink remains in the baseline
when the solvent is nearly at the top, you take it out and leave it to dry.

Question 4

what is the scientific name of the finished product?

Answer 4

a chromatogram

Question 5

what is the mobile phase of the experiment?

Answer 5

The solvent (as its moving)

Question 6

what is the stationary phase of the experiment?

Answer 6

The filter paper (as its not moving)