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What is the minimum solvent feed if feed is 200kg and the mass fraction of component A at feed is 0.7, at mixing is 0.5, and in the solvent is 0.4?

What is the minimum solvent feed if feed is 200kg and the mass fraction of component A at feed is 0.7, at mixing is 0.5, and in the solvent is 0.4? Correct Answer 400kg

Since, Smin/F= (xa)F-(xA)M/(xa)M-(xA)S , then, Smin= 200*(0.7-0.5/0.5-0.4)=400kg.

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