Can someone help me out answer these questions?? Thanks
i. When you place your TLC plate in the developing jar, what will happen if your spot is below the level
of the solvent?
ii. What do you think will happen if you leave your plate in the developing jar for several minutes after
the solvent has reached the top? (You may want to try it and see what happens.)
iii. Should you draw your initial Rf = 0 line with a pen rather than a pencil? How about a crayon? (Try it
and find out!)
iv. What are "hexane", "hexanes", "petroleum ether", and "ether"?
v. Your neighbor exposed his TLC plate to I2, then used UV light. Will the results be the same as using
UV first, then I2? Explain.
vi. What will happen if you dissolve a sample in too much solvent before adding it to a chromatography
column? How will this affect the quality of the separation?
vii. KBr plates are hygroscopic. How might this property affect your IR spectrum?
viii. How might the presence of residual solvent affect your IR spectrum? Where would the solvent peaks
appear?
i. When you place your TLC plate in the developing jar, what will happen if your spot is below the level
of the solvent?
ii. What do you think will happen if you leave your plate in the developing jar for several minutes after
the solvent has reached the top? (You may want to try it and see what happens.)
iii. Should you draw your initial Rf = 0 line with a pen rather than a pencil? How about a crayon? (Try it
and find out!)
iv. What are "hexane", "hexanes", "petroleum ether", and "ether"?
v. Your neighbor exposed his TLC plate to I2, then used UV light. Will the results be the same as using
UV first, then I2? Explain.
vi. What will happen if you dissolve a sample in too much solvent before adding it to a chromatography
column? How will this affect the quality of the separation?
vii. KBr plates are hygroscopic. How might this property affect your IR spectrum?
viii. How might the presence of residual solvent affect your IR spectrum? Where would the solvent peaks
appear?
