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In a liquid-liquid extraction with immiscible solvents, the two carrier liquids

  • A.each tie their own phase together
  • B.must be balanced together as one stream
  • C.cannot be used in a balance at all
  • D.appear in each of the four streams

Answer: A

Correct answer: each tie their own phase together

With immiscible solvents each carrier stays entirely in its own phase, so its flow is the same entering and leaving. Each therefore serves as a tie component for its own stream, and the balances can be written on a solute-free basis - which reduces the problem to tracking the solute alone and is the standard simplification in extraction calculations.

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