In fractional distillation, the greater thelength of a fractionating column: *the lower its efficiencythe further it becomes from an idealdistillationthe higher its efficiencythe faster the distillation will proceed

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Answered: In fractional distillation, the greater…

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter84: Fractional Distillation, Azeotropes

Section: Chapter Questions

Problem 4P

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explain why the boiling point of a two component mixture rises slowly throughout a simple distillation when the boiling-point differences are not larger
Describe the distillation of partial miscible liquid in terms of phase diagram.
7.A student carried out a fractional distillation of an unknown binary (2-component) mixture from a 50 mL pot solution. Based on the plot below, and assuming no azeotropes, what percent by volume was the solution in the lower boiling point component?
A solution of cyclohexane-toluene mixture was distilling at 88 oC. The analysis of a sample of the distilled liquid and a sample of vapor at that temperature indicate that 60% of the liquid and 77% of the vapor is cyclohexane. Calculate mole fractions of each compound in the solution and in the vapor.
in fractional distillation, how do you tell which liquid is in which fraction and which fraction has a mix of liquids if you are trying to seperate cyclohexane and toluene?? what would the density and boiling point of the first fraction be
The solubility is 12.8g in 100mL of ethanol at 0 degrees C, and 46.4 g in 100mL of ethanol at 60 degrees C. What is the maximum percent recovery that can be achieved for the recrystallization of acetanilide from ethanol?
Can a mixture of trichloromethane and propanone be separated into the pure components by fractional distillation? Explain
Calculate the mass of naphthalene required to give a freezing point depression of 2.9°C when dissolved in the amount of cyclohexane specified in the procedure(15mL). For this prelab problem you should use the density of cyclohexane as being 0.7781 g/mL at room temperature.
The graph of temperature-component mole fraction for Benzene-Ethanol binary system is given in the picture. If you want to purify this binary mixture, which is known to have a 0.8 mole fraction, by simple (ordinary) distillation, what would the mole fraction of benzene in the distillate be approximately (but a reasonable value)?
A mixture of organic solvent (nitrobenzene) and water boils at 363K. The vapour pressure of water at 363K is 733mm. Calculate the weight percentage of the organicsolvent in the distillate.
Sodium chloride (NaCl) was isolated from SiO2 and CaCO3 by dissolving it in distilled water. Unmentioned is that CaCO3 is slightly soluble in water (0.001 g/100 mL). Describe the effect this fact will have on each component of the mixture: will the “isolated“ mass of each be greater than, equal to, or less than that in the sample?
The vapor pressure of pure dichloromethane at 298 K is 57.3 kPa. What is its vapor pressure above its mixture with chloroform with 8:2 molar ratios of dichloromethane to chloroform (consider their mixture an ideal solution)

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In fractional distillation, the greater the length of a fractionating column: * the lower its efficiency the further it becomes from an ideal distillation the higher its efficiency the faster the distillation will proceed