Question:
While estimating the nitrogen present in an organic compound by Kjeldahl’s method, the ammonia evolved from 0.25g of the compound neutralized 2.5mL of 2M H2SO4. The percentage of nitrogen present in organic compound is ________
While estimating the nitrogen present in an organic compound by Kjeldahl’s method, the ammonia evolved from 0.25g of the compound neutralized 2.5mL of 2M H2SO4. The percentage of nitrogen present in organic compound is ________
Updated On: Sep 24, 2024
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Correct Answer: 56
Solution and Explanation
NH3 gas is neutralized by 2⋅5mL of 2M H2SO4
∴ Moles of NH3 neutralized = \(2⋅5 × 2 × 2\) millimole
= \(10×10^{–3}\) moles
∴ Weight of N present in compound will be
= \(10 × 10^{–3}\times14\)
= 0⋅14g
% of ‘N’ in compound
=\(\frac{0.14}{0.25}\)×100=56%
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- Nitrogen is the 7th element of the periodic table between carbon and oxygen.
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