1.

0.16 g of an organic substance was heated in carius tube and the sulphuric acid formed was precipitated as `BaSO_(4)` with `BaCl_(2)`. The weight of the dry `BaSO_(4)` was 0.35g Find the % of sulphur

Answer» % of `S=(32xx"wt. of" BaSO_(4))/(233xx"wt. of organic substance")xx100`
% of `S=(32xx0.35)/(233xx0.16)xx100=30.04%`


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