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1.95 Gm of Coal Sample Was Taken for Nitrogen Estimation by Kjeldahl’S Method. the Ammonia Liberated Required 9.5 Ml of 0.4 N H2so4 for - Applied Chemistry 2

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Numerical

1.95 gm of coal sample was taken for nitrogen estimation by Kjeldahl’s method. The ammonia liberated required 9.5 ml of 0.4 N H2SO4 for neutralization. Calculate the percentage of nitrogen in coal sample.

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Solution

Given:
Weight Of Coal= 1.95 gm Normality of H2SO4= 0.4 N
Volume of H2SO4= 9.5 ml
Required: % N=?
Formula: %N=`("vol of"  H_2SO^4xx"Normality"xx1.4)/"wt of coal"`

%N= `(9.5xx0.4xx1.4)/(1.95)`

%N= 2.72%

Concept: Solid Fuels - Analysis of Coal
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