Please help! Alcohol rt* Area bp (degree C) MW (ug/ mu mol) d(mg/mu L) Area/ mu
ID: 800896 • Letter: P
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Alcohol rt* Area bp (degree C) MW (ug/ mu mol) d(mg/mu L) Area/ mu mol CH 3OH 3.94 110185 64.7 32.04 0.791 CH 3 CH 2 OH 5.51 229297 78.4 46.67 0.789 CH 3 CH 2 CH 2 OH 7.48 254966 97.0 60.10 0.8034 CH 3 CH(OH)CH 3 6.57 266816 82.5 40.10 0.785 *rt is retention time Table 2: area under the curve for different volumes of the same alcohol. Alcohol is 1-propanol. Volume Area mu L 0.1 121248 0.2 216381 0.3 307085 Complete Table 1 by adding boiling point, molecular weight and density data and calculating the area per mu mole for each alcohol. Note that units of g/mole = mu g/pmole, and g/mL = mg/mu L. You can find the values for density and boiling point either in the CRC Handbook, or on line. Calculate Area per mu mole assuming that in each case, 0.2 mu L of the alcohol were injected into the gc. You should note that the value you obtained for Area per mu mole is different for every alcohol. Why? Explain the reason why the values are not the same. Plot rt vs. bp for the four alcohols. What is the relationship? What is the effect of branching on bp? On retention time? Plot area under the curve vs. volume for 1-propanol. What is the relationship? What area would you expect if you loaded 1.5 mu L of 1-propanol into the gc? If you loaded a sample of 1-propanol on the gc and the area under the curve was 277176, how many moles of alcohol would that correspond to?Explanation / Answer
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