Q1 Is it possible for a retention factor to be greater than one?
Why or why not?
Q2. Why is it important NOT to use a pen when writing on the TLC
plate?
1. Retention factor is always less than 1 since retention factor is a ratio of distance travelled by component to the distance moved by solvent or in other terms it is relative movement of solute and solvent. If the value is too close to 1, that means solvent and solute move together which could be unreliable and can happen if solvent is too polar for selected solute.
2.Pen can not be used on TLC plate since ink and coloring agents used in ink can travel through the plate when TLC plates are put in solvent and this may interfere with the detection of actual solute.
Q1 Is it possible for a retention factor to be greater than one? Why or why...
1. How does the sample separate on a TLC plate? 2.What are some ways to visualize a TLC plate? Why may it be necessary to have more than one method to visualize a TLC plate? 3.Describe how to obtain a Retention Factor. What does the retention factor tell you?
Q1.why the short circuit test of the transformer is done at voltage less than rated voltage? Q2.which has the largest power factor in the short or open circuit and why? note: please careful about the writing so the information can be readable thank you in advance
why is it not possible to measure a stopping voltage greater than 120V
1. When separating mixtures using TLC, why is it important to choose a solvent (mobile phase) that has a different polarity than the TLC plate (stationary phase)? 2. Why will some substances in a mixture travel farther up the TLC plate than others?
11. Why should you use pencil instead of pen when marking on a thin layer chromatography plate? a. Pencil lead isn't as dark. b. The components of pen ink will separate along with your sample, while pencil lead will not. c. Pen ink will not mark on a TLC plate. d. Pen ink will undergo a chemical reaction with the solvent. 12. Which of the following is not a reason to use thin-layer chromatography? a. To determine the number of...
6.) Explain with as much detail possible why when bonding, fluorine will have a greater pull on bonding electrons compared to iodine. U 7.) Explain with as much detail possible why sodium has a larger atomic radius than magnesium, 8.) Explain with as much detail possible why phosphorus has a larger atomic radius than nitrogen. 9.) Elements are very chemically reactive in groups 1 and 7. Use the trends to explain this observation. 10.) Below are the first thru third...
What is the Phi factor for shear? Why is the Phi factor typically lower than the Phi for flexure? What are two cases that we cannot use the ACI approach to shear design? Why can't we use the ACI method? Why is it possible to design for the shear at “d” away from the support? What are the advantages of designing for the shear at “d” away from the support?
why does the rolling bicycle have greater stability than one at rest
*** write in matlab *** use for loops largestfactor_for Write a function that takes a positive integer greater than one and returns its largest factor (other than itseir). You must use a for loop to solve this problem. Do not use functions factor), primes(), and divisors() . Do not use while loops Do not use vectorized code. alargestfactor 105) 35 largestfactor_for Write a function that takes a positive integer greater than one and returns its largest factor (other than itseir)....
Classify and breifky explain the different patterns of genetic inheritance in humans Questions for the Thin Layer Chromatography Laboratory 1. Why can't you use a pen to mark the origin of a TLC plate? Be explicit in your answer. 2. You were impatient to see how long it would take for your sample to resolve on the TLC plate, so you constantly removed the top from the chamber. Please explain why this is an incorrect practice. 3. What happens when...