Question

0.2 g of a substance was Kjeldhalized and the ammonia liberated was absorbed in 60 mL of N/5 $H_{2}S{O}_4$. The excess acid required 40 mL of N/10 NaOH for complete neutralization. Find the percentage of nitrogen in the compound.

• A. $70\%$
• B. $28\%$
• C. $36\%$
• D. $56\%$

Answer 1

The correct option is D $56\%$

% $N=\frac{1.4\times (N_A{V}_A-N_B{V}_B)}{wtoftheorgcomp.}$

$\therefore \%N=\frac{1.4\times (0.2\times 60-0.1\times 40)}{0.2}$

$=56\%$