In Kjeldahl's method, ammonia evolved from of a soil sample neutralized of . The percentage of nitro — Practical Organic Chemistry and Purification Chemistry Question
Question
In Kjeldahl's method, ammonia evolved from $0.75\text{ g}$ of a soil sample neutralized $10\text{ mL}$ of $1\text{ M } H_2SO_4$. The percentage of nitrogen in the soil is:
Answer: B
💡 Solution & Explanation
$H_2SO_4$ is $1\text{ M}$, so Normality $N = 2\text{ N}$. $\%N = \frac{1.4 \times 2 \times 10}{0.75} = \frac{28}{0.75} = 37.33\%$.
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