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 that can contribute to discrepancies of the result O All are Method's limitation O only ii and iii are the limitations O only i and ii are teh limitation O only i is the limitation

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 that can contribute to discrepancies of the result O All are Method's limitation O only ii and iii are the limitations O only i and ii are teh limitation O only i is the limitation

Macroscale and Microscale Organic Experiments

7th Edition

ISBN:9781305577190

Author:Kenneth L. Williamson, Katherine M. Masters

Publisher:Kenneth L. Williamson, Katherine M. Masters

Chapter5: Distillation

Section: Chapter Questions

Problem 4Q

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(b) TABLE 3 shows data phase equilibrium diagram for carbon dioxide. TABLE 3 Pressure (atm) Temperature (°C) Triple point Critical point 5.2 -57 73 31 (i) Sketch a phase diagram for carbon dioxide (ii) Explain the phase changes that could possibly occur when a sample of carbon dioxide in a closed vessel under 1 atm pressure and a temperature of -78°C is pressurised isothermally to 10atm, followed by isobaric heating to 20°C.
QUESTION 6 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 ii are the limitations O All are Method's limitation O only i is the limitation O only ii and iii are the limitations
a.) A 12 kmol liquid mixture with XSi = 0.8, xca = 0.2 at 1500oC was cooled to 1030oC. Determine the amount of liquid and pure solid Si that are in equilibrium with each other. b.) Suppose the mixture in (a) is cooled further to 900oC. how many kg of CaSi2 is formed? (Molar weights: Ca – 40 g/mol, Si – 28 g/mol) c.)At xSi = 0.694 and T = 1030oC, is the system solid, liquid, or both?
liquid to X N. Ask Your X N. Ask Your XA ALEKS-LX GSketching Xx www-awu.aleks.com/alekscgi/x/sl.exe/to_u-IgNsikr7;8P3jH-IvTqeviKFP6W0cqJcWJdIACROQwyw24GWHin7gZDVJOY1PIGdwmoRjhTWafiMXzDVQ21WWbzcCZqUso... lube Maps esc OSTATES OF MATTER Using heat of fusion or vaporization to find the heat needed to... Calculate the amount of heat needed to melt 125. g of solid acetic acid (HCH,CO₂) and bring it to a temperature of 78.1 °C. Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol. 0 Explanation CRM Q A 2 Check Z W S # 3 X heat of so X X E H $ 4 D 5 > R C % 5 F tv T V MacBook Pro 6 G PA Thank Y & 7 B Ⓒ2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility A YO Aa H U The 8 N J ( 1 9 S K M 0 O TO L < I 05 JE - P 200 40 40 Lar d A
1. Solid-Liquid Equilibrium 1500 Liquid 1314 1324 1300 1268 1100 1040 1030 900 700 0.2 0.4 0.6 0.8 Mole fraction of Si, x. a) A 12 kmol liquid mixture with xạ = 0.8, Xa = 0.2 at 1500 oC was cooled to 1030 oC. Determine the amount of liquid and pure solid Si that is in equilibrium with each other. b) Suppose the mixture in (a) is cooled further to 900 oC. How many kg of Casi; is formed? (Molar weights: Ca - 40 g/mol, Si - 28 g/mol) c) At xa = 0.694 and T = 1030 oC, is the system solid, liquid, or both? Temperature, e°C 0.056 0.402 Casi Casi, D69'0
6. Using phase diagram for the mixtures of benzene and ethylbenzene shown below, estimate: Benzene / Ethybenzene at 1.00 atm By NRTL A) Boiling point of pure ethylbenzene 140- 135- 130- B) Boiling point (Tpp) of solution with molar fraction of benzene 0.3. 125 120- 115 110- C) Composition of vapor phase (molar fractions of both liquids) above the solution with molar fraction of benzene 0.3 at Töp. 105- 100 90 85 80- 75- a1 02 03 04 05 06 0.7 0.8 09 Benzene Mole Fracfioni
For a successful crystallization the following conditions are desired? Agitated vessel O Cold solvent O Stationary (still) vessel O Slow crystal growth Warm solvent Fast solid formation (precipitation)
Mganga is doing a routine analysis in a copper plating factory. He is regularly making up solutions of verypure CuSO4.5H2O. He suspect that a batch of a reagent used to make up a stock solution of CuSO4.5H2Ois impure and it may contains some CuCl2. He asked you to determine the percentage impurity as follows:Dissolve1.500g of a mixture and make up to 1.00L mark.150mL of this solution was treated with 20.00mLof 0.100M AgNO3 to remove 98.6% of chloride as AgCl precipitate.
boiling point boiling point BPtof pure A vapour composition liquid composition Bpt of pure B O A 1.0B 1.0 A mole tractions OB Create your scale on the x and y axes. Estimate the boiling point of the mixture which is composed of 80% A and 20% B. What will be the vapor composition? SUBMIT YOUR SOLUTION WITH ILLUSTRATION AND APPROPRIATE LABELS ON THE DIAGRAM.
POin Elevation Aselution in preparnd by dissolving 15.60gof ordinary ger (sueroe, CHO, molecular weight-342 amu) in 15.00 gof water Calculante the boiling peier of the solution Sacose i anovolatile nonelectrolyte Solvent TC) THC) rCkg/mal) rChg/moll Benzene, Cal 80.1 253 55 530 Camphor, Cato 204 176 37.7 Cyciohexane, CH B0.88 2.79 6.50 202 Nitrobenzene, Cll, NO, 2108 524 81 water, H0 100.0 0.00 Submit Sho A h E Try A
Define the relative amounts of liquid and vapor phases in a saturated mixtureare specified by the quality x.
A gas mixture consists of 0.62 percent N, and 0.38 percent CO, by mole basis. Take 1 kg mole of the mixture and the molecular weight of N2 and CO2 are 28 and 44 kg/kg.mol respectively. Determine the (i) mole fractions of the constituents, (ii) mass fractions of constituents, (ii) the average molar mass of the mixture, and (iv) the average gas constant of the mixture. Take universal gas constant is 8.314 kJ/k mole.K. mole fraction of N2 mole fraction of CO2 Mass fraction of N2 Mass fraction of CO2 Molar Mixture Mixture gas constant