0.261 g ofa sample of pyrolusite was heated with excess of HCl and the – InterviewSolution

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1.	0.261 g ofa sample of pyrolusite was heated with excess of HCl and the chlorine evolved was passed in a solution of Kl . The liberated iodine requuired 90 mL N/30Na_(2)S_(2)O_(3). Calculate the percentage of MnO_(2) in the sample.
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