Question

In the estimatin of sulphur by Carius method, $0.864$ g of an organic sulphur compound afforded $0.686$ of barium sulphate. Find the percentage of sulphur in the given compound.

• A. $46.8$%
• B. $10.87$%
• C. $37.80$%
• D. None of these

Answer 1

The correct option is B $10.87$%

The mass of organic compound taken = 0.864 g

Mass of BaSo₄ formed = 0.686 g

Percentage of sulphur = 32/233 × mass of BaSO₄ formed/mass of substance taken × 100

= $\frac{32}{233}\times \frac{0.686}{0.864}\times 100$ = 10.87%