questions 1-9

Which of the following diagrams illustrate(s) an improper way of spotting a TLC plate? Describe what is "wrong" in your choice. answer a-d

1. Which of the following diagrams illustrate(s) an improper way of spotting a TLC plate? Describe what is "wrong" in your choice. 5 pts b. c. d. 2. The handout procedure says "Place small cotton plug LOOSELY in bottom of 50ml burette "why is cotton needed? 1 pts 3. Rank the following in order of increasing polarity, "1" being the least polar? 2nts 4. What is a stationary phase? Which stationary phase will you use in this experiment? 2 pts 5. Why will you have to elute with petroleum ether or hexanes before adding dichloromethane (DCM)? 2 pts 6. The spot that travels furthest on TLC is the most polar. TRUE or FALSE? 6. The spot that travels furthest on TLC is the most polar. TRUE or FALSE? 2 pts 7. Like dissolves like, TRUE or FALSE? 2 pts 8. Why is it wrong to use ink pen to draw the baseline (origin) on your TLC? 2 pts 9. What instrument will you use to visualize the spots on the developed TLC? 2 pts Column Chromatography QUIZ 3 3. Which of the following diagrams illustratec as an ampenper way of mpottinat a TLC plate? Tell what is wrong in caeh wuch case. a. b. 1. Which of the following diagrams illustrate(s) an improper way of spotting a TLC plate? Describe what is "wrong" in your choice. 5pts