Estimation of halogens: Carius method: A known mass of compound is heated with conc. `HNO_(3)` in the pressure of `AgNO_(3)` contained in a hard glass tube known as Carius tube in a furance . C and H are oxidised to `CO_(2)` and `H_(2)O` . The halogen forms the corresponding AgX. It si filtered m dried and weighted . Extimation of sulphur: A known mass of compound is heated with fuming `HNO_(3)` or sodium peroxide `(Na_(2)O_(2))` in the presence of `BaCl_(2)` solution in Carius tube. Sulphur is oxidised to `H_(2)SO_(4)` and percipipated as `BaSO_(4)` .It is filtered , dried and weighed. Percentage of S `=("Atomic mass of S")/("Molecular mas of" BaSO_(4)) xx ("Mass of" BaSO_(4) xx 100)/("Mass of compound")` 0.2595 gm of an organic substance when treated by Carius method gave 0.35 gm of `BaSo_(4)` . Calculate the percentage of sulphur in the compound.A. 9B. 30.4C. 18.52D. 40.52

Estimation of halogens: Carius method: A known mass of compound is hea

1.	Estimation of halogens: Carius method: A known mass of compound is heated with conc. `HNO_(3)` in the pressure of `AgNO_(3)` contained in a hard glass tube known as Carius tube in a furance . C and H are oxidised to `CO_(2)` and `H_(2)O` . The halogen forms the corresponding AgX. It si filtered m dried and weighted . Extimation of sulphur: A known mass of compound is heated with fuming `HNO_(3)` or sodium peroxide `(Na_(2)O_(2))` in the presence of `BaCl_(2)` solution in Carius tube. Sulphur is oxidised to `H_(2)SO_(4)` and percipipated as `BaSO_(4)` .It is filtered , dried and weighed. Percentage of S `=("Atomic mass of S")/("Molecular mas of" BaSO_(4)) xx ("Mass of" BaSO_(4) xx 100)/("Mass of compound")` 0.2595 gm of an organic substance when treated by Carius method gave 0.35 gm of `BaSo_(4)` . Calculate the percentage of sulphur in the compound.A. 9B. 30.4C. 18.52D. 40.52
Answer» Correct Answer - C

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A compound `H_(2)X` with molar mass of 80 g is dissolved in a solvent having density of `0.4 g mL^(-1)`. Assuming no change in volume upon dissolution, what is the molality of 3.2 M solution of the compound ?
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`4.0 g` of a mixture of `Nacl` and `Na_(2) CO_(3)` was dissolved in water and volume made up to `250 mL`. `25 mL` of this solution required `50 mL` of `N//10 HCl` for complete neutralisation. Calculate the percentage composition of the original mixture.
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