Assume that you are provided with an 18 cm fractionating column having an HETP of 6 cm to distill a mixture of 30% 2-methylpentane and 70 % toluene (L2). What would be the composition of the first drop of distillate. årnd Е. L6 С. L4 D. L5 A. L1 В. LЗ
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- Temperature - distillate volume plot for fractional distillation of benzene (b. pt. 80°C) and toluene (b. pt. 110°C ) The area where benzene is being distilled from the mixture. O a. FR1 b. cannot be determined. c. FR2 d. FR316) Which of the following(s) is/are correct? I- Selectivity factor is the amount of time a solute spends in the stationary phase relative to the time it spends in mobile phase II- The retention time for an analyte is the time interval between its injection onto a column and its appearance at the detector at the other end of the column. III- Distribution constant is the ratio of the total solute concentration in the stationary phase to that in the mobile phase. A) I, II and III B) Only II C) I and III D) II and III E) Only III for GC2Researchers used gas chromatography to determine the % v/v methyl salicylate in rubbing alcohol [Van Atta, R. E.; Van Atta, R. L. J. Chem. Educ. 1980, 57, 230-231]. A set of standard additions was prepared by transferring 20.00 mL of rubbing alcohol to separate 25 - mL volumetric flasks and pipeting 0.00 mL, 0.20 mL, and 0.50 mL of methyl salicylate to the flasks. All three flasks were diluted to volume using isopropanol. Analysis of the three samples gave peak heights for methyl salicylate of 57.00 mm, 88.5 mm, and 132.5 mm, respectively. Determine the % v/v methyl salicylate in the rubbing alcohol.
- The distribution constant KD for 12 between chloroform and water is 87. Given Kf = 750 M for 1₂ 13`, what 12 fraction of 12 initially present in 50 mL of water is expected to partition into the organic phase after single extraction with 50 mL of chloroform?Example: Calculation the weight of barium iodate Ba(IO3)2 if it dissolved in 500mL of distilled water (D.W) at 25 °C if M.wt of ppt = 487 g/mole and %3D Ksp= 1.57x10.1. Calculate the capacity factor, k' for methyl paraben and propyl paraben. 2. Calculate the selectivity factor, a for the two-component mixture.
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- What is the minimum distribution constant that permits removal of 99% of a solute from 50.0 mL of water with five 10.0-mL extractions with toluene?You are given the suggestion that a 0.15 ppm quinine aqueous solution is a good concentration to shoot for in the experiments, but quinine fluoresces best when it is acidified to 0.10 M H2SO4. Describe how to make 100 mL of the recommended solution starting with quinine sulfate (actually, quinine hemisulfate salt monohydrate). Assume you also have 1.0 M sulfuric acid and de-ionized water.What is the minimum distribution constant that permits removal of 99% of a solute from 50.0 mL of water with two 25.0-mL extractions with toluene? five 10.0-mL extractions with toluene?