0
Why is the level of the solvent lower than the level of the spots?
Wiki User
∙ 6y agoWant this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
What problem will ensue if the level of the developing liquid is higher than the applied spot in a TLC analysis?
The effect on chromatographic work if the solvent level in the developing chamber is higher than the spotted sample is a thin layer chromatography. The solvent becomes polar enough and spot will move some distance.
What 2 solute molecules mixed with the solvent molecules in a solution cause the freezing point of a solution to be than it is for an equal volume of pure?
lower, solvent, lower, solvent
What would be the consequence of having so much solvent in the developing chamber that it would cover the application?
If the solvent level in the developing jar is deeper than the origin (spotting line) of the TLC plate, the solvent will dissolve the compounds into the solvent reservoir instead of allowing them to move up the plate by capillary action. Thus, you will not see spots after the plate is developed. These photos show how the yellow compound is running into the solvent when lifted from the developing jar.
Are collisions between solvent molecules and solute are more frequent at lower or higher temperatures?
Collisions between solvent molecules and solute are more frequent at higher than lower temperatures.
Is the sea level higher or lower than it was in the geologic past?
Sea level has been higher and lower than it is currently.
What problem will ensue if the level of developing liquid is higher than the applied spot in a TLC analysis?
If the spots are submerged in the solvent, they are washed off the plate and lost.
What problem will ensue if the level of the developing liquid is higher than the applied spot in a TLC analysis?
The effect on chromatographic work if the solvent level in the developing chamber is higher than the spotted sample is a thin layer chromatography. The solvent becomes polar enough and spot will move some distance.
What 2 solute molecules mixed with the solvent molecules in a solution cause the freezing point of a solution to be than it is for an equal volume of pure?
lower, solvent, lower, solvent
Explain why a solution has a lower boiling point than the pure solvent?
Most solutions have a HIGHER boiling point than the pure solvent. A solution with a lower boiling point than the solvent has formed an azeotrope.
Why must the solvent level be below the colored spots in chromatography?
If the colored spot is below the level of the solvent, the spot will simply dissolve into the solvent.Chromatography works because the solvent climbs up the 'column' by capillary action, picking up the colored spots along the way and dragging them along. Because of the chemistry of the colors and the solvents, some of the colors in the spots are easier to drag along the column than others, and move along faster.
What would be the consequence of having so much solvent in the developing chamber that it would cover the application?
If the solvent level in the developing jar is deeper than the origin (spotting line) of the TLC plate, the solvent will dissolve the compounds into the solvent reservoir instead of allowing them to move up the plate by capillary action. Thus, you will not see spots after the plate is developed. These photos show how the yellow compound is running into the solvent when lifted from the developing jar.
Supersaturated means that a solvent can dissolve solute than at a lower temperature?
more
Are collisions between solvent molecules and solute are more frequent at lower or higher temperatures?
Collisions between solvent molecules and solute are more frequent at higher than lower temperatures.
What is the lower alcohol level 08 or 0.01?
The lower level is .01, which is much lower than .08.
A lower than normal level of oxygen in tissues is called?
A lower than normal level of oxygen is called hypoxia.
Is the sea level higher or lower than it was in the geologic past?
Sea level has been higher and lower than it is currently.
Why air-conditioners are usually placed at a higher level rather than a lower level?
air-conditions are usually placed at a higher level rather than at a lower level.
