Question

In an estimation of sulphur by Carius method, 0.2175 g of the substance gave 0.5825 g of BaSO₄ , calculate the percentage composition of S in the compound.

Answer 1

Weight of organic compound = 0.2 175 g

Weight of BaSO₄ = 0.5825 g

233 g of BaSO₄ contains = 32 g of S

0.5825 g of BaSO₄ contains = \(\frac{32}{233}\) x \(\frac{0.5825}{0.2175}\) g of S

Percentage of S = \(\frac{32}{233}\) x \(\frac{0.5825}{0.2175}\) x 100 = = 36.78%