Which of the satements below is/are limitations of Dumas Method? i. The Ideal condition is just an assumption for the vapor of the volatile sample ii. The sample must be a volatile liquid with a boiling point above 25°C and below 100°C using similar method iii. Possibility of having Impurities may not cause discrepancies of the result only i and i are the limitations only i is the limitation All are Method's limitation only i and ii are the limitations

Which of the satements below is/are limitations of Dumas Method? i. The Ideal condition is just an assumption for the vapor of the volatile sample ii. The sample must be a volatile liquid with a boiling point above 25°C and below 100°C using similar method iii. Possibility of having Impurities may not cause discrepancies of the result only i and i are the limitations only i is the limitation All are Method's limitation only i and ii are the limitations

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Use an apparatus similar to that shown and assume that the round-bottom flask holds 10 mL and that the Claisen head has an internal volume of about 2 mL in the vertical section. At the end of a distillation, vapor would fill this volume, but it could not be forced through the system. No liquid would remain in the distillation flask. Assuming this holdup volume of 12 mL, use the ideal gas law and assume a boiling point of 100°C (760 mm Hg) to calculate the number of microliters of liquid (d = 0.9 g/mL, MW = 200) that would recondense into the distillation flask on cooling.
This experiment is determining the molar mass by using freezing point depression
can you please help with anything? i dont know how to prepare the LV line...
T Normal II Aralik Yok Baglik 2 Ronu Bagl.* x x GE A-D-A- ASeç Paragraf Stiller Düzenleme Ses Duzenley Yazı Tipi STEP1 Put some FeS particles into a big tube. Add 1 or 2 mL of 18% HCl solution onto FeS particles. Immediately close the tube with Pb(NO3)2 or Pb(CH:COO)2 immersed filtration sheet. STEP2 Follow the same steps up to closing tube by filtration sheet. Fix the glass funnel to the tube after adding HCl solution. Close the outlet of funnel with Pb(NO3)2 or Pb(CH3COO)2 immersed filtration sheet. Reaction between FeS and HCl: FeS+2HC1 FeCl2+H2S Reaction on filtration sheet: H2S+Pb(CH3COO)2 PbS+2CH:COOH 1. Why filtration sheet turned black in step1? 2. What happened filtration sheet in step2?
Which of the following liquid mixtures can be best separated using simple distillation? A. Dimethyl sulfoxide (b.p. 189°C) from ethylene glycol (b.p. 195°C) В. Propanol (b.p. 97°C) from water (b.p. 100°C) C. Isopropanol (b.p. 82.3°C) from water (b.p. 100°C) D. Toluene (b.p. 110°C) from hexane (b.p. 69°C) B.
[2] A mixture containing 70 mol% n-heptane and 30 mol% n-octane is subjected to a batch distillation at 1 atm pressure. What will be the composition of the distillate after the first 25 mol% of the original charge is distilled. Estimate the initial and final boiling point and what is the composition of the first vapor condensed? T-x-y values of n-heptane 106 0.647 T. "C 98.4 100 103 110 115 120 122 124 125.6 1 0.922 0.776 0.495 0.318 0.156 0.097 0.039 1 0.963 0.883 0.801 0.681 0.500 0.281 0.184 0.078
Which of the following consideration are applied when choosing a suitable recrystallization solvent? (TRUE / FALSE) True False Should have a boiling point that is ~ 30-40 ℃ above room temperature. True False Dissolve the compound in a reasonable amount of solvent. True False Should be unreactive toward the compound of interest. True False Offers moderate solubility of the compound to be purified at room and lower temperatures. True False Does not dissolve impurity at all or complete/high solubility of impurity at all temperatures.
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When performing arecrystallization, slocent with a boiling point less must be use than the melting point of the compound being recrystallized. For benzil ( m.p.94-95C) which solvent would be best for this recrystallization? toluene (b.p. 110C) H2O (b.p.100 C) ethane( bo -98) methanol(bp64.7)
1a. Use the given table to construct a temperature-composition diagram for cyclohexane Toluene mixture. Based on the plot, what is the composition of the distillate obtained by Simple distillation 20 mole percent cyclohexene and 80 mole percent toluene? Show your Work on the plot. 1b. Estimate the composition of the distillate of 20 mole percent of cyclohexane if the Distillation column had three theoretical plates.
a. Draw a rough sketch of a melting curve for the non-reacting eutectic mixture of Solids A and B.Given that the hypothetical melting point of pure solid A is 150°C and the hypothetical meltingpoint of solid B is 100°C. The eutectic point at temperature of 60°C corresponds to the 73mol%composition for B solid.b. Label the important regions corresponding to the:i. mol% axis for solids A and B.i. maximum melting temperatures for pure solid A and pure solid B.ill. the eutectic point.iv. molten (all liquid) regionv. all solid regionvi. region for solid A with meltvii. region for solid B with melt
Fill in the blanks: a) The component of the mixture that becomes a water soluble salt by treating the two component mixture with sodium hydroxide solution has the highest _______________. b) The lower phase in equipment used for liquid-liquid extraction in a water-dichloromethane mixture is_____________, because _______________. c) The component of the mixture that becomes a water-soluble salt is the one with the greatest ______________