How to Prepared and Standardize of 0.05 N Potassium Iodate Volumetric Solution.

How to Prepared and Standardize of 0.05 N Potassium Iodate Volumetric Solution.

                                                                 

                                                            

                                                               

Preparation of 0.05 N Potassium Iodate Volumetric solution

➤ Glass ware and instruments required.

Beaker, Glass stirrer, Graduated Pipettes, Graduated cylinder, Analytical balance, Sucker, Volumetric flask, Burette, Conical Flask, Fume hood.

➤ Reagents required.

Potassium Iodate Reagent grade,

Molecular Wt. :- KIO₃,  214.0

Potassium Iodide,

Sulphuric Acid Dilute, 

Sodium thiosulphate Volumetric Solution (0.05M),

Starch Solution.

➤ Preparation.

Weigh and transfer about 10.7 g of potassium iodate reagent grade into 1000 ml volumetric flask. Dissolve it in sufficient water and make up to the mark. Filter the solution, if it is not clear.

➤ Standardization.

Pipette out 25 ml of 0.05 M potassium iodate solution into 100 ml volumetric flask, and make up with water. To 20 ml of this solution, add 2 g of potassium iodide, and 20 ml of dilute sulphuric acid. Titrate with 0.1 M sodium thiosulphate VS using 1 ml starch solution, added towards end of titration, as an indicator.  End point is blue to colourless.

➤ Calculations.

                           g KIO₃  x  0.005 x 20 x 25

 M= ----------------------------------------------------------------------

                     0.03566 x Burette Reading in ml x 1000