Question

$0.257g$ of an organic substance was heated with conc. $H_2{SO}_4$ and then distilled with excess of strong alkali. The ammonia gas evolved was absorbed in 50 mL of M/10 $HCl$ which required 23.2 mL of M/10 $NaOH$ for neutralisation at the end of the process. Determine the percentage of nitrogen in the compound.

Answer 1

Percentage of Nitrogen in compound

$\%N=1.4\times$ Normality of HCl $\times$ volume of HCl used for complete Neutralization

Mass of organic substance

$=\frac{1.4\times 0.1\times 23.2}{0.257}$

$\%N=12.63$