In this experiment, you will prepare a octahedral complex of Cu(II) in aqueous medium. The synthesized complex is further analyzed for its copper and ammonia content. Copper is determined iodometrically and ammonia content is determined by back titration method.

Prerequisite:

  • Knowledge about coordination complex and their geometry
  • Different types of titration
  • Acid-base indicators/ Theory of acid base titration

Techniques and Skills:

  • Titration (Using burette, pipette, taking proper volumetric measurements)
  • Filtration
  • Use of weighing balance

Further Reading

Jeffery, G.H., Bassett, J., Mendham, J., Denney, R.C., (1989). Vogel’s Textbook of Quantitative Chemical Analysis. John Wiley & Sons Inc, New York, 5th edition, chapter 10, (pp. 360-416)

This book gives a detailed account of the theoretical concepts of oxidation-reduction reactions using different examples. Writing half cell equations followed by complete balanced equations, titration curves, determination of the end point of titration, choice of indicators and examples of typical redox titrations carried out in the chemistry laboratories are dealt in depth.  

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Homi Bhabha Centre for Science Education, Tata Institute of Fundamental Research