For a normal phase separation, predict the order of elution of the following compounds a. n-hexane, n- hexanol, benzene, 1,2-hexadiol, 1,2-pentadiol b. ethyl acetate, diethyl ether, nitrobutane, 2-nitrobutane, 3-methyl-1-nitrobutane, 2- methyl-1-nitrobutane
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For a normal phase separation, predict the order of elution of the following compounds
a. n-hexane, n- hexanol, benzene, 1,2-hexadiol, 1,2-pentadiol
b. ethyl acetate, diethyl ether, nitrobutane, 2-nitrobutane, 3-methyl-1-nitrobutane, 2-
methyl-1-nitrobutane
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- Write the Lineweaver–Burk (doublereciprocal) equation and describe thefeatures of a Lineweaver–Burk plot.2. The onset of the glass transition temperature Tg of the following polymers was measured: • poly(n-butyl methacrylate) (CAS# 9003-63-8) • poly(methacrylic acid) (CAS# 25087-26-7) • poly(n-hexyl methacrylate) (CAS# 25087-17-6) • poly(methyl methacrylate) (CAS# 9011-14-7) • poly(t-butyl methacrylate) (CAS# 25189-00-8) The measured values, in decreasing order, were: 228oC, 115oC, 110oC, 20oC, and -5oC. Assign the correct Tg to each polymer. Draw the structure for each polymer to help explain your answer. Support and explain your answer in your own wordsAn experimental method of determining solubility parameters of polymers involves taking lightly crosslinked (network) samples of the polymers in question and immersing them in different solvents whose solubility parameters are known. Explain the rationale behind this method.
- 2) Assume you are decaffeinating your coffee by extracting the caffeine out with dichloromethane. Your particular brand of coffee contains 100 mg of caffeine in a 200 mL cup of water. The partition coefficient of caffeine in dichloromethane/water is 8.0 (it is more soluble in the dichloromethane).Answer the following questions about how much caffeine would still be in the 200 mL of water based on two different approaches. You should solve this algebraically. If you use an equation found on the internet, you will need to show how it was derived to receive credit.a) How much caffeine would remain in the water after extracting once with 200 mL of dichloromethane? Show your work.b) How much caffeine would remain in the water after extracting twice, each time with 100 mL of dichloromethane? Show your work.Use Woodward-Fieser rules to estimate the λmax for the following compound.What is the total collisional frequency at 298 K for a collection of Ne and He confined to a 1 dm3 container with partial pressure of 0.45 atm Ne and 0.55 atm He?