The Total solution for NCERT class 6-12
A sample of 0.50 g of anorganic compound was treated according to KjeldahlтАЩs method. The ammoniaevolved was absorbed in 50 mL of 0.5 M H2SO4. Theresidual acid required 60 mL of 0.5 M solution of NaOH for neutralisation. Findthe percentage composition of nitrogen in the compound.
Given that, total massof organic compound = 0.50 g
60 mL of 0.5 M solutionof NaOH was required by residual acid for neutralisation.
тИ┤Acid consumed inabsorption of evolved ammonia is (50тАУ30) mL = 20 mL
Again, 20 mL of 0.5 MH2SO4┬а=40 mL of 0.5 MNH3
Also, since 1000 mL of 1MNH3┬аcontains 14 g of nitrogen,