Q.
In the estimation of nitrogen by Kjeldahl's method, 2.8gm of an organic compound required 20 millimole of H2SO4 for the complete neutralisation of NH3 gas evolved. The percentage of nitrogen in the sample is:
884
171
Organic Chemistry – Some Basic Principles and Techniques
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Solution:
Percentage of N = Weight of compound 1.4×mEq⋅ of H2SO4 used to neutralise NH3 m moles of H2SO4=20
mEq. of H2SO4=20×2=40
Percentage of N=2.81.4×40=20%