Н18 The concentration of nitrite ions in the solution i

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The concentration of nitrite ions in the solution is 0.100 mol / l. To some volume of this solution was added 50.0 ml bromine concentration of 20.0 g / l and diluted sulfuric acid. Then the resulting solution was added dropwise 10.0% solution of sodium sulfite to the disappearance of yellow color, characteristic of bromine. Total added 5.15 ml (dense. 1.09 g / ml). Calculate the amount of stock solution containing nitrite ions.

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