1.95 gm of a coal sample was taken for nitrogen estimation by Kjeldahis method.

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1.95 gm of a coal sample was taken for nitrogen estimation by Kjeldahis method.

written 5.2 years ago by

vibhavarikulkarni • 480

modified 4.1 years ago by

sanketshingote • 100

The ammonia liberated required 9.5ml of 0.4N $H_2 SO_4$ for neutralisation. Calculate the percentage of Nitrogen in coal sample.

advanced engineering chemistry

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written 5.2 years ago by

vibhavarikulkarni • 480

% of Nitrogen:

= $\text{Volume of acid consumed} \times \text{Normality} \times \frac{1.4}{ \text{weight of coal sample} }$

= $9.5 \times 0.4 \times \frac{1.4}{1.95}$

$\therefore N \% = 2.72 \%$

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