Briefly explain the extractions with diphenylthiocarbazone. How is change in pH useful in such extractions?

Diphenylthiocarbazone (dithizone) is a chelating agent that forms highly stable colored complexes with metal ions, particularly with transition metals like copper, zinc, and lead. It is widely used in analytical chemistry for the extraction and determination of these metals from aqueous solutions. The extraction process typically involves the reaction of dithizone with the metal ion in the __________ ______ _____ _________ _____ ____ _____.
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