Two compounds have boiling points of 130 and 150 C. Estimate the number of theoretical plates...
Question:
Two compounds have boiling points of 130 and 150°C. Estimate the number of theoretical plates needed to separate these substances in fractional distillation.
Theoretical Plates in Fractional Distillation:
Theoretical plates specify the efficiency of the fractional distillation column. It is considered as the hypothetical zone where the liquid and the vapor phases of a substance to be separated develop an equilibrium with each other.
Answer and Explanation: 1
Become a Study.com member to unlock this answer! Create your account
View this answerThe efficiency of the separation processes depends upon having a number of equilibrium stages. The efficiency of separation process can also be...
See full answer below.
Ask a question
Our experts can answer your tough homework and study questions.
Ask a question Ask a questionSearch Answers
Learn more about this topic:

from
Chapter 1 / Lesson 9Learn about fractional distillation. Understand the what fractional distillation is and its principles, see a diagram of its process, and view examples of fractional distillation and its uses.
Related to this Question
- Two components have boiling points of 130 degree C and 150 degree C. Estimate the number of theoretical plates needed to separate these substances in a fractional distillation.
- Organic Chemistry Problem: Two compounds have boiling points of 130 and 150 degrees Celsius. Estimate the number of theoretical plates needed to separate these substances in a fractional distillation
- In a miscible mixture of two compounds with boiling points within 75 degrees C, which technique would be most appropriate? (a) IR spectroscopy (b) Pipetting (c) Decanting (d) Simple distillation
- In distillation components of a mixture are separated into groups of molecules with similar 1. densities. 2. melting points. 3. None of these. 4. bond energies. 5. boiling points.
- Fractional distillation is a technique used to separate complex mixtures of hydrocarbons based on differences in their: a. heats of fusion b. heats of vaporization c. melting points d. boiling points
- Use the thermodynamic data provided below to estimate the boiling point (in K) of ICl. Substance ? H 0 f ( k j / m o l ) S 0 ( J m o l ? 1 K ? 1 ) ICl (l) -23.89 135.1 ICl (g) 17.78 247.6
- Distillation is a process that separates the substances in liquid solutions based on their: a. boiling points b. melting points c. solubility d. color
- Fractional distillation separates the components of crude oil based on: a. their molecular size. b. their volatilities. c. their boiling points. d. all of the above.
- Which would be separated best by a simple distillation: two liquids with boiling points 10 degrees C apart, or two liquids with boiling points 50 degrees C apart? Why?
- Ethanol prepared by distillation is only about 96 percent pure because it forms a low-boiling binary azeotrope with water. 100 percent ethanol can be made by adding a specific amount of benzene to form a ternary azeotrope that boils at 64.9 degrees Celsiu
- A compound has the empirical formula CH2O. When 0.0866g is dissolved in 1 g of either, the solutions boiling point is 36.5 degrees C. Determine the molecular formula of this substance.
- 1) Calculate the boiling points of these solutions: 0.1 m Na3P 0.2 m NaBr 0.16 m C12H22O11 POTENTIALLY USEFUL INFORMATION: Kb for water = 0.512 C*kg solvent/mol solute 2) Place the above solutions in order of boiling point from lowest to highest.
- Why might the boiling point for the mixture be different from the boiling point of the individual materials? Would you expect the mixture to have a lower or higher boiling point than the individual ma
- The boiling points of three compounds are tabulated here.
- Calculate the theoretical boiling point of a solution prepared by dissolving 50.0 g of MgCl2 in 500 mL of water.
- In a distillation of a mixture of two components, the first compound to condense into the receiving flask will be: a. the one with the lower melting point b. the one with the higher melting point c. the one with the lower boiling point d. the one with the
- Arrange these compounds by their expected boiling point (CH, CH3CH, CH3CL) highest to lowest boiling point.
- Use the thermodynamic data provided below to estimate the boiling point (in K) of CS2. Report your answer to zero decimal places in standard notation (i.e. 123. kJ *For numbers ending in zero, be sure
- Why is it that a pure liquid does not distill at the normal boiling point? How can you distill a mixture of liquids where both have a boiling point above 100 degrees C?
- How can the boiling point data for the possible compounds in your unknown, assist in the determination of which compounds are present? Give a brief example and explanation to your answer.
- The boiling point of isopentyl alcohol is approx. 130 degrees Celsius. The boiling point of isopentyl acetate is approx. 142 degrees Celsius. This experiment did not utilize fractional distillation to separate the acetate from the alcohol, therefore there
- A mixture of two miscible liquids with widely different boiling points is fractionally distilled. The temperature of the distilling liquid is observed to be steady and then drops before rising again.
- The boiling points of ethanol and ethanal are 78.37 degrees C and 20.2 degrees C respectively. Explain the reason for this variation in the boiling points of these two compounds with similar molecular weights. Discuss intermolecular attractions between t
- Calculate the boiling point of a solution prepared by adding 11.5 grams of naphthalene (C10H8) to 250.0 grams of benzene. Naphthalene is a non-electrolyte solute, and benzene is an organic solvent that exhibits a boiling point of 80.10 C and has Kb = 2.5
- (PART 1) Calculate the boiling points of these solutions: 0.1 m Na2P 0.2 m NaBr 0.16 m C12H22O11 (PART 2) Place the above solutions in order of boiling point from lowest to highest.
- Estimate the boiling point of Br_2(l) (H = 30.9 kJ, S = 93.0 J/K).
- The fluorocarbon compound C_2Cl_3F_3 has a normal boiling point of 47.6 degrees C. The specific heats of C_2Cl_3F_3(l) and C_2Cl_3F_3(g) are 0.91 J/g K and 0.67 J/g K, respectively. The heat of vaporization for the compound is 27.49 kJ/mol. Calculate the
- In a mixture of liquids, liquid A is steam volatile,and decomposes at its boiling point. Explain the method of separating liquid A from the mixture, with physical principles involved.
- To separate alcohol from water by distillation, is it possible if I heat the mixture to 100 degrees C so water reaches its boiling point? Explain.
- If I am doing a fractional distillation, is the temperature of the first few drops of the distillation considered part of the boiling range or do you wait until later in the distillation?
- Pinacolone has a boiling point of 106 C. During the distillation of the product, the distillation was stopped when the temperature of the distillate reached 100 C. Why?
- A 5.00 g sample of a large biomolecule was dissolved in 16.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85 degrees C. Calculate the molar mass of the biomolecule. For carbon tetrachloride, the boiling point const
- The normal boiling point of benzene is 80.1 C. A 0.85-gram sample of a nonvolatile compound with a molar mass of 185 g/mol is dissolved in 2.75 g of benzene. What is the expected boiling point of this solution?
- Rank these compounds by their expected boiling point. Highest boiling point Lowest boiling point CH_3Cl, CH_3OH, CH_4
- Calculate the approximate boiling point of a solution made from 100 grams of sodium sulfate and 100 grams of water (Kb of water is 0.52 C/m).
- The molar masses and boiling points of two carbon compounds are given below. Why is there such a large difference between their boiling points despite their similarity in molar mass? Ethane (C2H6): molar mass = 30 g/mol, boiling point = -89 degrees Celsiu
- The normal boiling point of benzene is 80.1 C. A 0.861 g sample of a non-volatile compound with a molar mass of 185 g/mol is dissolved in 2.63 g of benzene. What is the expected boiling point of this solution? (Kb for benzene is 2.53 C/m)
- Estimate the difference between the normal and standard boiling points of water.
- A 2.40-g sample of a large biomolecule was dissolved in 12.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85 degrees Celsius. Calculate the molar mass of the biomolecule. For carbon tetrachloride, the boiling point
- .Given the following mole fraction and vapor pressures for miscible liquids A and B, calculate the composition (in mole percentage) of the vapor from a distilling an ideal binary solution at 150 C and
- Which of the following is NOT true about an azeotrope? a. The boiling point of an azeotrope can be higher than the individual boiling points of its component molecules. b. The composition of an azeo
- Explain why the boiling points of the components of a mixture should differ by at least 40 degrees Celsius in order to get an effective separation by simple distillation.
- Estimate the fugacity of the following liquids at its normal boiling point temperature and 200 bars : A) n-pentane B) 1-butene
- The molar masses and boiling points of two carbon compounds are given in the following table. Why is there such a large difference between them in boiling point, despite their similarity in molar mass
- Assign each of the boiling points below to the respective substances on the basis of intermolecular forces. N_2, HCN, C_2H_6 a) -196 degrees Celsius b) -89 degrees Celsius c) 26 degrees Celsius
- Arrange these compounds by their expected boiling point. Highest boiling point Lowest boiling point CH3OH, CH3Cl, CH4
- The solubility of a compound in water is 6.8g/100ml at 0.33g/100ml at 25 degree celsius. Calculate the amount of water required to crystallize 10g of the compound. If the pure compound is collected at
- What is the boiling point of a 0.743m aqueous solution of KCI? (Report the amount to three decimal points.)
- When separating a liquid mixture composed of two very different boiling points, when the first compound is completely distilled the temperature of the system will rapidly raise. Why does this happen? (a) Since the more volatile compound has left and the h
- Why does the boiling point of a binary mixture rise slowly throughout a simple distillation when the difference in boiling points is not large?
- Trouton's law says that the standard molar entropy of vaporization of nearly all liquids is 87 J/mol.K. Estimate the standard boiling point for benzene given ? H v a p o = 33.6 k J / m o l .
- Calculate the theoretical boiling point of a solution made by dissolving 20.0 g of CaCl2 in 100.0 g of water. Kb for water = 0.512 C/m A) 104.6 C B) 99.1 C C) 100.9 C D) 97.2 C E) 102.8 C
- A group of students were measuring the normal boiling points of a series of compounds with the same approximate molecular masses: butane (CH_3CH_2CH_2CH_3), acetone (CH_3C(O)CH_3), and 1-propanol (CH_3CH_2CH_2OH). Unfortunately, the labels for each b
- How many values of the normal boiling point does any pure substance have? Explain answer.
- The solubility of a compound in water is 6.8g/100ml at 0 degrees C and 0.33g/100ml at 25 degrees C. Calculate the amount of water required to crystallize 10g of the compound. If the compound is collec
- Rationalize the difference in boiling points for the following pair of substances.
- Calculate the boiling points of freezing points of the following solutions in water. a) boiling point of a 2.25 m solution of propylene glycol (a non-electrolyte) b) freezing point of a 1.0 m solution
- Why is benzene (C6H6, boiling point = 78 degrees Celsius) not used as a recrystallization solvent? a. because it is nonpolar b. because it is an aromatic compound c. because its boiling point is too low d. because it forms explosive peroxides e. because i
- Calculate the approximate boiling point of a 4 m NaCl solution. K_b(H_2 O)=0.52 C/m A). 106.1 C B). 109.6 C C). 108.3 C D). 120.8 C E). 102.1 C
- If water has a boiling point of roughly 100 degrees C, why does it evaporate at room temperature?
- A 0.85 g sample of solute with a molecular mass of 185 g/mol is dissolved in 2.25 g of benzene. What is the expected boiling point of the solution?
- Calculate the weight of benzene co-distilled with each gram of water and the percentage composition of the vapor produced during a steam distillation. The boiling point of the mixture is 69.4C. The vapor pressure of water at 69.4C is 227.7 mmHg.
- The normal boiling point of ethanol is 78.4 degrees Celsius, and at this temperature delta vapH^o = 38.7 KJ/mol. Calculate the value to which the pressure must be reduced to boil ethanol at 25 degrees Celsius in a vacuum distillation.
- A 2.00 g sample of a particular compound was dissolved in 15.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85 degrees C. For pure CCl_4, T_B = 76.50 degrees C and K_B = 5.03 degrees C kg/mol. Calculate the boiling
- Calculate the boiling point of a solution of 500.0 g of ethylene glycol (C2H6O2) dissolved in 500.0 g of water. Kf = 1.86 C/m and Kb = 0.512 C/m. Use 100 C as the boiling point of water.
- During a semi-microscale boiling point determination, the sample is heated until a constant stream of bubbles is observed. The boiling point is taken after heating is discontinued and liquid re-enters the inverted capillary tube. Why is the boiling point
- Rationalize the difference in boiling points for given pair of substances.
- Rationalize the difference in boiling points for the given pair of substances.
- Estimate the boiling point of tin(IV) chloride, SnCl4, at one atmosphere pressure.
- Name at least two experimental parameters that can affect the determination of the boiling point when performing a distillation. State how to optimize those two parameters so that you can get the correct boiling point.
- The normal boiling point of pure benzene is found to be 80.10 C. What is the approximate molecular weight of a nonionizing substance, if a solution of 3.55 g of the substance dissolved in 100. g of benzene has the normal boiling point of benzene, C 6
- A solution is made by dissolving 0.616 mol of non-electrolyte solute in 827 g of benzene. Calculate the boiling point of the solution.
- If the boiling point of the recrystallization solvent is higher than the melting point of the compound to be purified, it could lead to: a. a reaction between the solvent and the compound b. nothing c. the decomposition of the compound d. oiling out of th
- Determine the boiling point of alcohol (CH_3)_2CHCH_2CH_2OH.
- Calculate the boiling point (in Celsius) of a solution made by dissolving 5.21 g of naphthalene ( C 10 H 8 ) in 97.5 g of C C l 4 . The K b p of the solvent is 4.95 K/m and the normal boiling point is 76.5 C.
- The molar mass of a non-volatile solute is 176.0 g/mol. Compute the boiling point of a solution containing 68.0 g of the solute and 750.0 g of water when the barometric pressure is such that pure water boils at 99.825 C. (Kb = 0.52 C/m)
- Pinacolone has a boiling point of 106 ^oC. During the distillation of the product, the distillation was stopped when the temperature of the distillate reached 100 ^oC. Why?
- A solution is prepared by dissolving 27.0 g urea, (NH_2)_2CO, in 150.0 g water. Calculate the boiling point of the solution. Urea is a nonelectrolyte.
- A solution is prepared by dissolving 28.0 g urea, (NH_2)_2CO, in 156.5 g water. Calculate the boiling point of the solution. Urea is a nonelectrolyte.
- A solution is made by dissolving 0.686 moles of a non-electrolyte solute in 747 grams of benzene. Calculate the boiling point of the solution.
- A solution is made by dissolving 0.726 moles of a non-electrolyte solute in 857 grams of benzene. Calculate the boiling point of the solution.
- A solution is made by dissolving 0.696 moles of a non-electrolyte solute in 819 grams of benzene. Calculate the boiling point of the solution.
- A solution is made by dissolving 0.532 moles of a non-electrolyte solute in 775 grams of benzene. Calculate the boiling point of the solution.
- A solution is made by dissolving 0.534 moles of a non-electrolyte solute in 897 grams of benzene. Calculate the boiling point of the solution.
- When you mix two compounds, the melting point of the compound is lowered, but the boiling point is elevated. Explain why.
- Estimate the boiling point elevation of 0.57 m C12H22O11(aq). The boiling point constant of water is 0.51 K kg/mol. Answer in units of degreeC.
- The molar masses and boiling points of two carbon compounds are: Ethane (C_2H_6): molar mass: 30 and boiling point: -89 ^oC. Methanol (CH_3OH): molar mass: 32 and boiling point: 65 ^oC.
- Construct an approximate boiling point composition diagram for a Benzene-Methanol system. The mixture shows azeotropic behavior. Include on the graph the boiling points of pure benzene and pure methanol and the boiling point of the azeotrope. Describe the
- When carrying out simple distillation, how do you know that a given liquid substance has attained its boiling point under the conditions of the experiment?
- What is the expected boiling point and mole percentage of pentane expected if a solution which was 20% pentane and 80% hexane was distilled?
- Substance A has a boiling point of 80 degrees C and a density of 3.5 g/cc. Substance A: a. might be an element b. must be an element c. must be a compound d. might be a mixture
- I did a simple distillation and a fractional distillation to purify acetone. How do I determine the concentration of acetone?
- Describe the method you would use to seperate a mixture of water (boiling point=100 degree C) can be seperated from ethanol (boiling point= 60 degree C)
- Calculate the weight of benzene co-distilled with each gram of water and the percentage composition of the vapor produced during steam distillation. The boiling point of the mixture is 69.4 degrees Celsius. The vapor pressure of water at 69.4 degrees Cels
- The boiling point of a simple alcohol is an ether, assuming both have about the same molecular weight. a. greater than b. lower than c. the same as
- Rank the following alcohols from alcohol with the highest boiling point to alcohol with the lowest boiling point. To rank items as equivalent, overlap them.
- The boiling point of diphenyl ether is 259 degrees C. It dissolves many nonpolar compounds but it is a poor solvent for crystallization. Why?
- A certain substance X has a normal boiling point of 101.5 degrees Celsius and a molar boiling point elevation constant Kb = 1.49 degrees C/m. A solution is prepared by dissolving some urea (NH2)2CO in 200 g of X. This solution boils at 104.4 degrees Celsi
- A 1.26 g sample of a molecular compound is dissolved in 105 g of tetrachloromethane (carbon tetrachloride). The normal boiling point of the solution is 61.51 C, and the normal boiling point of C C l 4 is 61.2 C. The boiling point constant for C C
- A mixture of two miscible liquids with widely different boiling points is distilled. The temperature of the distilled liquid is observed to plateau and then drop before rising again. Explain the tempe