74. Solving a chemistry problem
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- a) What requirements must be met by the reference substances in oximetry, permanganatometry and bromatometry? (Write the equations of chemical reactions. b) How much iron (II) (in%) does the iron wire contain, if after dissolving 0.1400 g of it in sulfuric acid without access, air went to titrate the resulting iron (II) sulfate solution 24.85 ml 0.1 N permanganate solution?
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