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Updated: May 10, 2025
KMnO = 0.2004 gram Na C O . Calculate the percentage of sulphide sulphur in the sample. !Answer!: 0.050%. What weight of pyrolusite containing 89.21% MnO will oxidize the same amount of oxalic acid as 37.12 cc. of a permanganate solution, of which 1 cc. will liberate 0.0175 gram of I from KI? !Answer!: 0.2493 gram.
A sample of pyrolusite weighs 0.2400 gram and is 92.50% pure MnO . The iodine liberated from KI by the manganese dioxide is sufficient to react with 46.24 cc. of Na S O sol. What is the normal value of the thiosulphate? !Answer!:: 0.1105 N. !Answer!: 0.08339 N.
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