Mass Transfer
The rate of solid-liquid extraction is limited by the

Phase change of the solute as it dissolves in the solvent
Diffusion of the solute through the solvent in the pores to the outside of the particle
All of these
Diffusion of the solute from the solution in contact with the particle to the main bulk of the solution

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Mass Transfer
In case of an absorber, the operating

Velocity is more than the loading velocity
Line always lies above the equilibrium curve
Line can be either above or below the equilibrium curve
Line always lies below the equilibrium curve

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