Chemistry Question Help
Hey guys. I have a question about chromatography for this lab we're doing.
Let's say we have a solution with copper ions in it. The copper ions travel 20 mm while the solvent front travels on for 80 mm.
Now, in another chromatogram of a solution of a mixture with cations, the solvent travels 70 mm. If the same copper ions from the first ones were this solution, how far would they travel.
What I'm looking for is whether or not there is a relation between the distance the ions travel to the solvent front or if there is no effect.
The way I see it is if the solvent front travels 80, and the ions travel 20, the difference is 60 and so in the next chromatogram, it would travel 70-60=10mm OR it has no effect at all and will travel 20mm in both cases regardless of the distance the solvent travels.
Thanks!
3 Comments • Newest first
So the distance the solvent moves effects where the ions are on the paper right? so it would be at 10mm?
In doing paper chromatography, you probably drew a line on which you put the pigment spot(s). From that line to the top of the paper where the solvent front stopped (when you took the paper out of the solvent) is the "distance the solvent front migrated."
It's not from the bottom of the paper, it's measured from where you put the pigment spot(s).
god i hate chemistry and labs