Chemistry

posted by .

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 -

    See your post above.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. science(chemistry)

    I have a question about TLC plate solvents. What solvents will leave stains on a plate with a TLC plate out of the ones below and why?
  2. chemistry

    what are some source errors in my experiment?
  3. gr 12 chemistry

    consider the two compounds, CH3CH2CH2CH2CH2OH and CH3CH2OCH2CH2CH3. Giving reasons for your choice, select the compound that a) will evaporate at a lower temperature b) has higher solubility in a non-polar solvent c) can undergo an …
  4. Organic Chemistry

    Which statements are FALSE about selecting a solvent for recrystallization?
  5. Chemistry

    I have 2 questions on columns used in the Gas Chromatography-Flame Ionisation Detector (GC-FID) instrument: - 1) If a capillary column is left in the GC-FID instrument for 2 months with the instrument switched off (i.e. instrument …
  6. Chemistry

    Assume your sample spots are 1 cm above the bottom of the TLC plate. What happens if you put the plate in a developing chamber that has 1.2 cm of developing solvent?
  7. chemistry

    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
  8. CHEMISTRY

    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
  9. Chemistry

    Consider the compounds 4-tert-butylcyclohexanol and 4-tert-butylcyclohexanone. Using silica gel plates, which of the two compounds will have the higher Rf value when ethyl acetate is the developing solvent?
  10. Biology

    Uable to find correct answer: In general it is expected_____________ A) hydrostatic pressure will remain constant throughout the capillary bed B) osmotic pressure will be higher in the arteriole end of the capillary bed compared to …

More Similar Questions