In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from 1 g of sample neutralized 10 mL of text1M H2 textS textO4. The percentage of nitrogen in the soil is [Report your answer to the nearest integer]

Question

In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from 1 g of sample neutralized 10 mL of text1M H2 textS textO4. The percentage of nitrogen in the soil is [Report your answer to the nearest integer] (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

In 1 g of sample the percentage of nitrogen can be find out as follows

N % = \frac{14 \times N \times V}{W _{O . C .}} \times 100

Here

N \times V

of

H_{2} S O_{4} = n \times M \times V

= 2 \times 1 \times 10 \times 1 0^{- 3} = 20 \times 1 0^{- 3}

% Nitrogen

= \frac{14 \times 20 \times 1 0 ^{- 3}}{1} \times 100 = 28%

Q. In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from 1 g of sample neutralized 10 mL of 1M H2​SO4​. The percentage of nitrogen in the soil is [Report your answer to the nearest integer]

In 1 g of sample the percentage of nitrogen can be find out as follows N%=WO.C.​14×N×V​×100 Here N×V of H2​SO4​=n×M×V =2×1×10×10−3=20×10−3 % Nitrogen =114×20×10−3​×100=28%

Q. In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from 1 g of sample neutralized 10 mL of $1M H_{2} S O_{4} .$ The percentage of nitrogen in the soil is
[Report your answer to the nearest integer]