• British Pharmacopoeia Volume IV
  • Appendices
  • Appendix I B. Volumetric Reagents and Solutions
  • Volumetric Solutions

Potassium Iodate VS
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Potassium Iodate VS KIO3 = 214.0

For a 0.05m solution Dissolve 10.7  g of potassium iodate in sufficient water to produce 1000  ml.

Ascertain its exact concentration in the following manner. Dilute 25  ml of the solution to 100  ml with water and to 20  ml of this solution add 2  g of potassium iodide and 10  ml of dilute sulphuric acid. Titrate with 0.1m sodium thiosulphate VS using 1  ml of starch solution, added towards the end of the titration, as indicator. Each  ml of 0.1m sodium thiosulphate VS is equivalent to 3.566  mg of KIO3.