please read the full problem and answer the second half of the question. In order to extract acetic acid from a dilute aqueous solution with isopropyl

ether, the two immiscible phases are passed counter currently through a

packed column $5m$ in length and $63mm$ in diameter. It is found that if $0\mathrm{.}45$

$k\frac{g}{m^2}$ of the pure benzene is used to extract $0\mathrm{.}2k\frac{g}{m^2}s$ of $3\%$ acid by mass,

then the benzene phase leaves the column with a concentration of $0\mathrm{.}09$ per

cent acid by mass. The equilibrium relationship is given by: $kg$ acid $\frac{?}{kg}$

benzene$)$ acid $\frac{?}{kg}$ water$).$ Calculate the concentration of acid in the

raffinate.

It is found that, $20\mathrm{.}3kg$ water $100kg$ feed of the pure ether is used to extract

$4\%$ of acetic acid in a $7$ stage co$-$current. Calculate the mass of acetic acid

extracted.

The equilibrium relationship is given by: acid $\frac{?}{kg}$ isopropyl ether$)$

acid$/$kg water$).$