93. Solving a chemistry problem
📂 Chemistry
👤 Derkach
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2. A 0.1000 g sample of ore containing MnO2 was treated with concentrated HCl. The resulting chlorine was distilled off and absorbed with a KI solution. The released iodine was titrated with 21.25 0.0520 N Na2S2O3. Calculate the mass fraction (in %) of MnO2 in the ore.
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