Question 5: Answer the following: (15 Marks) A) Acetic acid is to be extracted from 0.55 kg/sec of a 10% aqueous solution by co-current extraction with 0.83 kg/sec of pure isopropyl ether. The concentration of acetic acid is to be reduced to 3% in the exit raffinate. Calculate how many equilibrium stages are required to achieve this extraction. (9 Marks) The equilibrium relationship is: Y = 0.21X Where, Y = Kg acetic acid/Kg isopropyl ether; and X = Kg acetic acid/Kg water B) Choose the correct answer for the following: (6 Marks) 1) In liquid-liquid extraction: a) The solvent should be antitoxic, nonflammable and low cost; b) Viscosity, Vapor Pressure, Freezing Point should be modern for ease in handling and storage; c) The smaller difference in densities of the saturated liquid phases I necessary. 2) For an endothermic reaction, the AH is: a) Less than zero b) Bigger than zero c) Equal zero 3) Percentage relative humidity represents: a) (Humidity of saturated air / humidity of air) × 100; b) (Partial pressure of vapor in gas/partial pressure of vapor in saturated gas) × 100; c) (Partial pressure of vapor in saturated gas / partial pressure of vapor in gas) × 100.
Question 5: Answer the following: (15 Marks) A) Acetic acid is to be extracted from 0.55 kg/sec of a 10% aqueous solution by co-current extraction with 0.83 kg/sec of pure isopropyl ether. The concentration of acetic acid is to be reduced to 3% in the exit raffinate. Calculate how many equilibrium stages are required to achieve this extraction. (9 Marks) The equilibrium relationship is: Y = 0.21X Where, Y = Kg acetic acid/Kg isopropyl ether; and X = Kg acetic acid/Kg water B) Choose the correct answer for the following: (6 Marks) 1) In liquid-liquid extraction: a) The solvent should be antitoxic, nonflammable and low cost; b) Viscosity, Vapor Pressure, Freezing Point should be modern for ease in handling and storage; c) The smaller difference in densities of the saturated liquid phases I necessary. 2) For an endothermic reaction, the AH is: a) Less than zero b) Bigger than zero c) Equal zero 3) Percentage relative humidity represents: a) (Humidity of saturated air / humidity of air) × 100; b) (Partial pressure of vapor in gas/partial pressure of vapor in saturated gas) × 100; c) (Partial pressure of vapor in saturated gas / partial pressure of vapor in gas) × 100.
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Transcribed Image Text:Question 5: Answer the following: (15 Marks)
A) Acetic acid is to be extracted from 0.55 kg/sec of a 10% aqueous solution by co-current extraction with 0.83
kg/sec of pure isopropyl ether. The concentration of acetic acid is to be reduced to 3% in the exit raffinate.
Calculate how many equilibrium stages are required to achieve this extraction. (9 Marks)
The equilibrium relationship is:
Y = 0.21X
Where, Y = Kg acetic acid/Kg isopropyl ether; and X = Kg acetic acid/Kg water
B) Choose the correct answer for the following: (6 Marks)
1) In liquid-liquid extraction:
a) The solvent should be antitoxic, nonflammable and low cost;
b) Viscosity, Vapor Pressure, Freezing Point should be modern for ease in handling and storage;
c) The smaller difference in densities of the saturated liquid phases I necessary.
2) For an endothermic reaction, the AH is:
a) Less than zero
b) Bigger than zero
c) Equal zero
3) Percentage relative humidity represents:
a) (Humidity of saturated air / humidity of air) × 100;
b) (Partial pressure of vapor in gas/partial pressure of vapor in saturated gas) × 100;
c) (Partial pressure of vapor in saturated gas / partial pressure of vapor in gas) × 100.
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