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What is diffrence between residue on ignition and sulphated
ash?
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Answer Posted / d .m shetty
the sulphates ash basically heavy metals more of calcium contents. when calcium oxide burns with sulphuric acid. it will convert to calcium sulphate. it will not evoparate. it remains in crucible as coloured residue. it may not be sodium sulphate because . sodium sulphate is burns completely and evaporated at high temp in muffle furnace.it is my experience. . not as expertise view.
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