A sample of 0.50 g of an organic compound was treated according to Kje

1.	A sample of 0.50 g of an organic compound was treated according to Kjeldahl’s method. The ammonia evolved was absorbed in 50 ml of 0.5 M H2SO4. The residual acid required 60 mL of 0.5 M solution of NaOH for neutralisation. Find the percentage composition of nitrogen in the compound.
Answer» % of nitrogen= 1.4Molarity of the acidBasicity of the acid* Volume of the acid used/Mass of the substance taken = 1.412*10/0.5 = 56.0

A sample of 0.50 g of an organic compound was treated according to Kjeldahl’s method. The ammonia evolved was absorbed in 50 ml of 0.5 M H2SO4. The residual acid required 60 mL of 0.5 M solution of NaOH for neutralisation. Find the percentage composition of nitrogen in the compound.

Answer»

% of nitrogen= 1.4*Molarity of the acid*Basicity of the acid* Volume of the acid used/Mass of the substance taken

= 1.4*1*2*10/0.5

= 56.0