if i didn’t pay attention to which bottle I grabbed and accidentally used hexane instead ofethyl acetate as my mobile phase! How would I predict the Rf’s of acetaminophen, aspirin, andcaffeine to be affected?
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if i didn’t pay attention to which bottle I grabbed and accidentally used hexane instead of
ethyl acetate as my mobile phase! How would I predict the Rf’s of acetaminophen, aspirin, and
caffeine to be affected?
Step by step
Solved in 2 steps
- Complete the table with the identified IR peaks and the interpretation of them. And based on the IR spectrum, what is the most likely identity of the analgesic sample? (Aspirin, Acetaminophen, Ibuprofen) Frequency of Important Peaks (cm-1) Functional Group InterpretationWhagt is the purpose of the following? Separate the active ingredients in an unknown over the counter analgesic using TLC (thin layer chromatography). Make a preliminary identification of each active ingredient in an unknown tablet by comparing its Rf value(s) with the Rf values of four different known active ingredients:When testing the absorbance of paracetamol with a uv spectrophotometer the following are the abosorbance levels with the concentration associated, what would this mean in terms of the aim of determining the amount of the analgesic paracetamol in commercial tablets using ultraviolet spectroscopy? Concentration (mg/L) Absorbance 0.75 0.032 1.5 0.075 2.25 0.125 4.5 0.181
- If the TLC eluent increases in polarity, what will happen to the Rf value of acetaminophen and phenacetin? Explain.I had having trouble understanding the TLC labs. Could someone help explain how to tell which compound has a higher Rf value? benzoic acid or trans-stilbene?Explain briefly the differences in Rf values of the pigments that you have separated from spinach juice. What properties must the pigment have to travel further in the chromatogram? Consider the structures of cholesterol and ?-carotene. Which do you think will have the highest Rf value if the solvent used was acetone - hexane (20:80)? Why?
- please analyse the IR spectrum of 4-methoxyphenyl acetate and assign peaks for the functional groups present in the molecule.what is the purpose of TLC Separation & Analysis of Analgesics?Identify the statement that correctly interprets this TLC analysis of a recrystallized sample of acetaminophen produced following the procedure outlined in Experiment 5: The TLC of an individuals purified acetaminophen showed two spots. One spot had an Rf identical to that of pure acetaminophen. This spot was also larger and darker than the second spot. The Rf of the second spot was very close to the Rf of pure 4-aminophenol. a) The two spots evident in my TLC analysis indicate my sample is a mixture. Since each spot has an Rf value that is close to the Rf of one of the authentic materials tested, I can conclude my sample is a mixture of acetaminophen and 4-aminophenol. The large size of the spot with an Rf nearly identical to authentic acetaminophen indicates my sample is mostly 4-aminophenol. b)I can conclude from this evidence that my sample is a mixture of acetaminophen and 4-aminophenol because the Rf of each of the spots is nearly identical to one of the authentic…
- How would you change the mobile phase to decrease the Rf for both spots? If you started with 1:10 ethyl acetate to hexane and Rfa = 0.70 and Rfb = 0.20. A) 1:7 ethyl acetate to hexane B) 100% ethyl acetate C) 1:6 ethyl acetate to hexane D) 1:15 ethyl acetate to hexane1. a compound has an Rf value of 0.97 diethyl ether but an Rf value of 0.045 in cyclohexane. Suggest a couple (at least three) solvent (solvents), or solvent system (systems), that might be better suited for this particular compound. 2. suppose your TLC plate shows only one spot at an Rf value of 0.015 (essentially it does not move). Does this mean that your sample is 100% pure? Explain your answer. 3. suppose your TLC plate shows only one spot at an Rf value of 0.98 (essentially with the solvent front). Does this mean that your sample is 100% pure? Explain your answer.In what order would the following compounds be eluted on a silica gel TLC plate if they are spotted on the same plate and developed in a solvent mixture of 10:1 hexanes:ethyl acetate A. 1 has the highest Rf value, then 2 then 4 then 3 b. 4 has the highest Rf value, then 1 then 3 then 2 c. 3 has the highest Rf value, then 2 then 1 then 4 d. 2 has the highest Rf value, then 3 then 1 then 4