During estimation of nitrogen present in an organic compound by Kjelda

1.	During estimation of nitrogen present in an organic compound by Kjeldahl’s method, the ammonia evolved from 0.5g of the compound in Kjeldahl’s estimation of nitrogen, neutralized 10 mL of 1 M H2SO4. Find out the percentage of nitrogen in the compound.
Answer» 1M of 10 mL H₂SO₄=1M of 20 mL NH₃ 1000 mL of 1M ammonia contains 14 g nitrogen 20 mL of 1M ammonia contains1420/1000 g nitrogen Percentage of nitrogen = 1420100/ 1000 0.5 =56.0%

During estimation of nitrogen present in an organic compound by Kjeldahl’s method, the ammonia evolved from 0.5g of the compound in Kjeldahl’s estimation of nitrogen, neutralized 10 mL of 1 M H2SO4. Find out the percentage of nitrogen in the compound.

Answer»

1M of 10 mL H₂SO₄=1M of 20 mL NH₃

1000 mL of 1M ammonia contains 14 g nitrogen

20 mL of 1M ammonia contains14*20/1000 g nitrogen

Percentage of nitrogen = 14*20*100/ 1000 *0.5 =56.0%