IGNOU BCHET 141 2026 - With the help of suitable equations explain the method solvent e

Question

With the help of suitable equations explain the method solvent extraction with Diphenythiocarbazone.

10 Jan 2026

Answer :

Word Count : 238

Solvent extraction with diphenylthiocarbazone, commonly known as dithizone, is an important separation and preconcentration technique used in analytical chemistry for the determination of trace metal ions. Dithizone is an organic chelating reagent that forms intensely colored, non-polar metal–dithizonate complexes, which are readily extractable into organic solvents such as chloroform or carbon tetrachloride from an aqueous phase. Dithizone (H₂Dz) behaves as a weak acid and exists in keto–enol tautomeric forms. In aqueous solution at an appropriate pH, it reacts with metal ions by replacing its acidic hydrogen atoms, forming

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