Question: 9 . Batch contact extractors are characterized by their _ _ _ _ _ _ _ _ _ _ operation, where the solvent and feed

9. Batch contact extractors are characterized by their __________ operation, where the solvent and feed are mixed and then allowed to settle for phase separation.
10. Continuous contact extractors, such as the __________ extractor, are preferred for large-scale operations due to their ability to handle large volumes of feed continuously.
11. The effectiveness of solvent extraction can be quantified by the __________ coefficient, which measures the distribution of a solute between two immiscible solvents.
12. For a solvent to be considered effective in an extraction process, it must have a high selectivity and affinity towards the solute, which is often measured by the __________.

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