Question

In Carius method of estimation of halogen, 0.20 g of organic compound gave 0.15 g of silver bromide. Calculate the percentage of bromine in the compound.

Answer 1

Mass of organic compound (m₁) = 0.20 g

Mass of silver bromide formed (m₂) = 0.15 g

188(108 + 80)g of AgBr contains 80g of bromine

∴ 0.20 g of AgBr contains 

= \(\frac{80\times 0.15}{188}g\) = 0.0638g of Br

Percentage of bromine 

= \(\frac{80\times 15\times 100}{188\times 20}\) = 31.92

The percentage of bromine in the given compound = 31.92