A $$0.166$$ g sample of an organic compound was digested with conc. $$H2SO4$$ and then distilledwith NaOH. The ammonia gas evolved was passed through $$50.0$$ mL of $$0.5$$ N $$H2SO4$$. The acid used for ammonia if neutralised requires $$30.0$$ mL of $$0.25$$ N NaOH for complete neutralization. The mass percentageof nitrogen in the organic compound $$is____$$.

Question

A $$0.166$$ g sample of an organic compound was digested with conc. $$H2SO4$$ and then distilledwith NaOH. The ammonia gas evolved was passed through $$50.0$$ mL of $$0.5$$ N $$H2SO4$$. The acid used for ammonia if neutralised requires $$30.0$$ mL of $$0.25$$ N NaOH for complete neutralization. The mass percentageof nitrogen in the organic compound $$is____$$.

Infinity Learn · Accepted Answer

millieq of ammonia $$=$$ millieq of sulphuric acid $$used=millieq$$ of $$NaOH=30x.25=.75$$ grams of nitrogen $$=$$ $$7.5x14x10-3=$$ $$0.105$$ g  % of nitrogen $$=0.105x1000.166=63.25$$%

Unlock the full solution & master the concept.

Ready to Test Your Skills?

prepare smarter

speak to our academic counsellor

free study material