Preparation and Standardization of 0.05 M Potassium Iodate : Pharmaguideline

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Preparation and Standardization of 0.05 M Potassium Iodate

Preparation and standardisation of 0.05 M Potassium Iodate using Sodium Thiosulphate and Starch solution as indicator.

Potassium Iodate Solution Preparation

  • Weigh accurately 10.7 g of potassium iodate, previously dried at 110°C to constant weight, in sufficient water to produce 1000 ml. 
  • Standardize the solution in the following manner.

Potassium Iodate Solution Standardization

  • Dilute 25.0 ml of the solution to 100 ml with water.
  • To 20.0 ml of this solution add 2 g of potassium iodide and 10 ml of 1M sulphuric acid. 
  • Titrate with 0.1 M sodium thiosulphate using 1 ml of starch solution, added towards the end of the titration, as an indicator.
  • 1 ml of 0.1 M sodium thiosulphate is equivalent to 0.003566 g of KIO3.
Also see: Determination of Shelf Life of Solutions in Laboratory

Ankur Choudhary is India's first professional pharmaceutical blogger, author and founder of, a widely-read pharmaceutical blog since 2008. Sign-up for the free email updates for your daily dose of pharmaceutical tips.
.moc.enilediugamrahp@ofni :liamENeed Help: Ask Question

1 comment: Post Yours! Read Comment Policy ▼

  1. sir
    why we are not including the dilution factor 100/20 in the standardisation calculation for KIO3


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