Question

During estimation of nitrogen present in an organic compound by Kjeldahl’s method, the ammonia evolved from 0.5 g of the compound in Kjeldahl’s estimation of nitrogen, neutralized 10 mL of 1 M `H_(2)SO_(4)`. Find out the percentage of nitrogen in the compound.

Answer 1

1M of 10 ml `H_(2)SO_(4)=1M` of 20 ml of `NH_(2)`
1000 ml of 1M ammonia contains =14g N
20ml of 1M ammonia contains `=(14xx20)/(1000)gN`
% of `N=(14xx20)/(1000xx0.5)xx100=56.0%`