- Mass Transfer - Section 1
- Mass Transfer - Section 2
- Mass Transfer - Section 3
- Mass Transfer - Section 4
- Mass Transfer - Section 5
- Mass Transfer - Section 6
- Mass Transfer - Section 7
- Mass Transfer - Section 8
- Mass Transfer - Section 9
- Mass Transfer - Section 10
- Mass Transfer - Section 11
- Mass Transfer - Section 12
- Mass Transfer - Section 13
- Mass Transfer - Section 14


Mass Transfer - Engineering
Q1: In a liquid-liquid extraction, 10 kg of a solution containing 2 kg of solute C and 8 kg of solvent A is brought into contact with 10 kg of solvent B. Solvent A and B are completely immiscible in each other whereas solute C is soluble in both the solvents. The extraction process attains equilibrium. The equilibrium relationship between the two phases is Y* = 0.9X, where Y* is the kg of C/kg of B and X is kg of C/kg of A. Choose the correct answer.A The entire amount of C is transferred to solvent B.
B Less than 2 kg but more than 1 kg of C is transferred to solvent B.
C Less than 1 kg of C is transferred to B.
D No amount of C is tranferred to B.
ANS:A - The entire amount of C is transferred to solvent B. To solve this problem, we can use the equilibrium relationship provided: š∗=0.9šY∗=0.9X, where š∗Y∗ is the concentration of C in solvent B (kg of C/kg of B) and šX is the concentration of C in solvent A (kg of C/kg of A). Initially, there are 2 kg of solute C in solvent A, and the total amount of solvent A is 8 kg. So, the initial concentration of C in solvent A is: š=2 kg8 kg=0.25 kg/kgX=8 kg2 kgā=0.25 kg/kg Now, using the equilibrium relationship š∗=0.9šY∗=0.9X, we can find the concentration of C in solvent B: š∗=0.9×0.25=0.225 kg/kgY∗=0.9×0.25=0.225 kg/kg At equilibrium, the total amount of solute C transferred to solvent B will depend on the final concentration of C in solvent B. Now, let's analyze the answer choices:
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