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A sample of sodium iodate with a mass of .311g is dissolved in water and made...

A sample of sodium iodate with a mass of .311g is dissolved in water and made up to 250 ml. 25.0 ml potions are added to KI that has been dissolved in sulfuric acid. The resultant iodine is titrated against sodium thiosulfate, the average volume being 12.5 ml. Calculate the molarity of the thiosulfate solution

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