Question

During estimation of nitrogen present in organic compound by kjeldahl's method, the ammonia evolved from 0.5 gm of the compound neutralized 10 ml of 1 m h2so4. calculate the %n in the compound.

Answer 1

1 M of 10ml H2SO4= 1M of 20ml NH3 ,1000 ml of 1M ammonia contain 14g nitrogen

20 ml of 1 M ammonia contain

14×20/1000g of nitrogen

percentage of nitrogen=

14×20×100/1000×0.5

= 56.0%

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