Q$3)$ An existing $7$ stages extractor is to be used for extracting acetic acid from water. Water feed is $20k\frac{g}{m}in$ and contains $15$ weight percent acetic acid $($Ac$).$ The pure solvent is methyl isobutyl ketone $($MIBK$).$ It is desired to have $95\%$ removal of acetic acid. Assume the slope of equilibrium line is $0\mathrm{.}7.$ Estimate the required solvent flow rate

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