Mass Transfer
In a single stage extraction process, 10 kg of pure solvent S (containing no solute A) is mixed with 30 kg of feed F containing A at a mass fraction xf = 0.2. The mixture splits into an extract phase E and a raf-finate phase R containing A at xB = 0.5 and xR = 0.05 respectively. The total mass of the extract phase is (in Kg)

6.89
10
8.89
8.25

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Mass Transfer
A coalescer in a mixer-settler liquid-liquid extraction coloumn

All of these
Helps in increasing the settling rate of the bubbles
Comprises of thin bed of substances of extended surface having high porosity
Helps in increasing the bubble size entering the settler

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