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Explain Carius method for the determination of Halogens quantatively in an organic compound . |
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Answer» Solution :Halogens can be estimated by Carius method . In this method a known weight of the organic compound is heated with fuming nitric acid in presence of `AgNO_(3)` in a hard glass tube. Carbon and hydrogen are oxidised to `CO_(2)` & `H_(2)O` . Halogens are converted into sivler halides . The silver halide is filtered off , washed , dried and weighted  Calculation : Mass of the organic compound = a g Mass of silver halide FORMED (AG X) = B g `therefore` Mass of halogen in b g of Ag X ............ ? `= ("(Atomic mass of X" xx " b) g")/( "Molecular mass of AGX") = 'C' g . ` a g of organic compound has C g of halogen `therefore` 100 g of organic compound has ................ ? `= (100 xx C)/( a) = (100 xx b xx "Atomic mass of X")/(a xx "Molecular mass of AgX")` (Molecular Masses : AgCl = 143.5(108 + 35.5) , AgBr= 188 (108 + 80) , Agl = 235 (108 + 127) ) |
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