In the closed system with multi$-$phases $($air$,$ water, suspended solid,

sedimented solid, and biota phases$),0\mathrm{.}001$ mole of toluene is added and then

the system reaches to equilibrium. The volume of air phase $($V$-$air$)$ is $10L$;

the volume of water$-$phase $($V$-$water$)$ is $1000$L; the mass of suspended solid

phase $(m-ss)$ is $10g$; the mass of sedimented solid phase is $100g$; the volume

of biota $($fish$)$ is $10$L$,$ the volumetric fraction of fat in fish is $1\%.$ The

dimensionless Henry's constant $(K_H)$ is $0\mathrm{.}2857.$ Toluene sorption onto

suspended solid follows linear distribution model with $K_D-SS=100\frac{g}{L},$ and

toluene sorption onto sedimented solid follows linear distribution model with

$K_D-$sed$=10\frac{g}{L}.$ The volume of biota$-$phase $($fish$)$ is $10L,$ and the volume of fat in biota$-$phase is $1\%($vol$/$vol$).$ Toluene partitioning coefficient $($Kp$)$

between fat and water phase is $100000($L$/$L$).$

$(1)$ Calculate water$-$phase toluene at equilibrium $($C$-$water$)$ using material

balance.

$(2)$ Compare toluene amounts distributed in different phases.

$(3)$ Identify in which phase toluene is the most accumulated.