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UPSC Combined Geo-Scientist

Chemist

  • 3 descriptive papers
  • 200 marks each
  • 3 h per paper

Mains Paper I covers inorganic chemistry.

UPSC Combined Geo-Scientist, Mains · 2016 · Mains Paper I

Q10(c). Iodometric determination of copper

Question

How is Cu²⁺ estimated iodometrically? Explain the reactions involved.

Answer in brief

Excess iodide reduces Cu(II) to precipitated CuI and liberates iodine, which is titrated with standard thiosulfate. Moles of Cu(II) equal moles of thiosulfate.

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CoversIodometric determination of copperVolumetric analysis

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