Question

What can you conclude from the chromatography results shown?


A. Substance B has weaker dipole-dipole forces than substance A has.
B. Substance C has stronger covalent bonds than substance D has.
C. Substance D adsorbs most strongly to the stationary phase.
D. Substance A has the most polar molecules of the substances.

Answer 1

@aaronq A right?

Answer 2

um are we assuming that it's a normal phase (i.e. polar) plate and non-polar solvent?

Answer 3

I'm not sure...this is all they gave me for the question.

Answer 4

um, i guess we should assume so, since it's the first configuration introduced.

So if we know that the plate (the stationary phase) is polar and the eluent (mobile phase) is non-polar, then A is more non-polar than B and B is more non-polar than C, etc.

Answer 5

So the answer is A?

Answer 6

if A is more non-polar, then B should have stronger dipole forces because it's more polar, right?

Answer 7

Yeah I guess...so B is the answer then?

Answer 8

nope. you couldn't know the strength of the covalent bonds from this type of experiment

Answer 9

ok so then it's D?

Answer 10

substance D is retained by the plate (the stationary phase) the strongest hence why it's the slowest migrating substanc

Answer 11

It's not D. It's option C

Answer 12

ok thanks!

Answer 13

np~