
The 3rd spot shows the good development of TLC Plate while
1st,2nd spots shows underdeveloped TLC plate and 4th, 5th spots shows overdeveloped TLC plate.
which spots of spinach extract show good development, overdevelopment and underdevelopment on this TLC plate?
help !!!
1. A student spots an unknown sample on a TLC plate and develops it in dichloromehane solbv Only one spot, for which the Ry value is 0.15, is observed. Does this indicate that the unknown material is a pure compound? What can be done to verify the purity of the sample?
1. A student spots an unknown sample on a TLC plate and develops it in dichloromehane solbv Only one spot, for which the Ry value is 0.15,...
No
length was given except the length of the TLC paper which was
10ml
TLC results: 1.6 TLC plate after development in hexanes/EIOAC 73 b ul bul b benzyl alcohol I lower layer u uppper layer 6. Calculate the rf's of the spots in the TLC's above. What do they tell us about the layers in the separatory funnel? TLC plate after development in hexanes/ETOAc 73 b ul b ul b-benzyl alcohol | lower layer ul-uppper layer 7. Calculate the...
Circle which, if any, of the following compounds would show up
as dark spots under a UV lamp when spotted on a TLC plate that
contains a fluorescent indicator:
Circle which, if any, of the following compounds would show up as dark spots under a UV lamp when spotted on a TLC plate that contains a fluorescent indicator: ohola on
10. On the TLC plate below, identify the spots in the unknown mixture as compound A, B, and C and calculate all Rt values. Lanes with X are unknown sample spots. State whether the solvent system used is a great one for the separation of the compounds. + A B X
10. On the TLC plate below, identify the spots in the unknown mixture as compound A, B. and C and calculate all Rf values. Lanes with X are unknown sample spots. State whether the solvent system used is a great one for the separation of the compounds. С X В X A
During the TLC plate you notice all of the spots remain on the baseline. What is the problem and how would you fix it?
1. Calculate the Rf values for spots A and B on the TLC plate drawn below. Based on the Rf values which compound (A or B) is most likely to be more polar? a. Calculate Rf values for A and B b. Which compound A or B will most likely be polar? Why?
2) Below is a developed TLC plate and the four compounds which are visualized on it. Match up the numbered TLC spots with the letters corresponding to the given structures.
Possible Quiz Questions 1 What two methods of visualizing spots on a TLC plate will you use in this Give two reasons why would you predict that the elution solvents (hexanes or acetate) would not be visible under UV visualization? week's lab? ethyl 2. Define R 3. Calculate the R of the spot on the following TLC plate. 4. Which compound in each pair is predicted to have the higher Ri? a. CH3CH2CH2CH2OH and CH3CH2CH2CH28r b. CH3CH2CH2CH2OH and CH3CH2CH2CH2CH2CH2CH3 c....
3. If the TLC plate development had stopped before the solvent front reached the top of the TLC plate (i.e. maybe it reached the middle of the TLC plate when it was stopped, instead): a) Would the Rf values have been affected? If so, how? If not, why not? Give a numerical example to support your answer. b) Would the size of the spots have been affected? If so, how? If not, why not? (Hint: think about the diffusion of...