Preparation Of 0.1N Potassium Bromate

Preparation Of 0.1N Potassium Bromate

 

Molecular Formula:  KBrO3

Molecular weight: 167.00

 

Preparation

:

2.784 g in 1000 mL

Dissolve 2.784 g of potassium bromate in water to make 1000 mL

Standardization

:

Transfer an accurately measured volume of about 40 mL of the solution to a glass-stoppered flask, add 3 g of potassium iodide, and follow with 3 mL of hydrochloric acid. Allow to stand for 5    minutes, then titrate the liberated iodine with 0.1 N sodium thiosulfate VS, adding 3 mL of starch TS as the endpoint is approached. Correct for a blank run on the same quantities of the same reagents, and calculate the normality.

 

  Preserve in glass-stoppered bottles, protected from light

Calculation

:

N

=

ml Na2S2O3 x N Na2S2O3

mL KBrO3 Solution

Reference

:

USP


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