Homework Help: chemistry

Posted by Hannah on Saturday, August 18, 2012 at 11:15pm.

In TLC, why do you spot multiple times? Select one or more correct answers.
A. To fill the capillary almost instantly by capillary action.
B. So the developing chamber solvent does not evaporate.
C. The higher compound concentration facilitates visualization.
D. To acheive a high concentration of sample in a small spot.

chemistry - DrBob222, Sunday, August 19, 2012 at 12:02am
Isn't D the choice? Are capillaries involved in TLC? Then A can't be right.
chemistry - Hannah, Sunday, August 19, 2012 at 3:13pm
There is more than one answer for this problem.

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