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____.

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A 0.166 g sample of an organic compound was digested with conc. H₂SO₄ and then distilled
with 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 percentage
of nitrogen in the organic compound is____.

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answer is 63.

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Detailed Solution

Explain Kjeldahl and Duma's method. Derive the expression for percentage of nitrogen. - Sarthaks eConnect | Largest Online Education Community $m i l l i e q o f a m m o n i a = m i l l i e q o f s u l p h u r i c a c i d u s e d = m i l l i e q o f N a O H = 30 x . 25 = . 75 g r a m s o f n i t r o g e n = 7.5 x 14 x 10^{- 3} = 0.105 g % o f n i t r o g e n = \frac{0.105 x 100}{0.166} = 63.25 %$