Mass Transfer
Stage efficiency in a leaching process depends on the

Rate of diffusion of the solute through the solid and into the liquid
Both A & B
Vapour pressure of the solution
Time of contact between the solid and the solution

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Mass Transfer
The McCabe Δ L law states that the

Linear crystal growth rate depends on the crystal size
Linear crystal growth rate does not depend on the crystal size
Linear crystal growth rate depends on the degree of supersaturation
Molar heats of vaporisation of components are nearly equal

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