Mass Transfer
In a counter-current liquid extractor

Only one of the liquids may be pumped at any desired rate
Liquid's flow rate depends upon the temperature and pressure
Both liquids can have any desired flow rate
Both liquids flow at fixed rate

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Mass Transfer
The McCabe Δ L law states that the

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

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