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The iodide content of a solution was det...

The iodide content of a solution was determined by titration with sodium thiosulphate crystalline containing 11.2 % impurity. Calculate the normality of iodide ion solution in 250 mL of the iodide solution required 20 mL hypo (42 g hypo is dissolved in 1 litre).

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The correct Answer is:
0.024
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