Astudent is comparing two samples of crystalline organic solids. a tlc analysis shows a single spot for each sample and the co-spot with the same rf value. which of the following would provide the most conclusive evidence that the two samples are the same compound?
-rerun the tlc using more developing solvent
-rerun the tlc on a longer tlc plate
-perform a mixture melting point
-mix the substances and run the tlc as a single spot

Rerun the TLC using more developing solvent

Explanation:

The TLC principle envolves the interaction of the samples with the solvent and the stationary phase.

For the solvent you are using at the moment, the interaction with the sample may be very similar for both cases depending with the polarity, what could indicate an equal value.

If you develops a new solvent with a different polarity, you can see if the samples are the same compound or not. Because a more polar compound will interact more with the stationary phase and a more non-polar compound will interact more with the solvent.

where are the choice options?

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.