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In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from 0.75 g of sample neutralized 10 mL of 1M H 2 S O 4 . The percentage of nitrogen in the soil is [Report your answer upto two decimal places]

Correct answer

37.33

Step-by-step solution

In 0.75 g of sample the percentage of nitrogen can be find out as follows N % = 14 × N × V W O . C . × 100 Here N × V of H 2 S O 4 = n × M × V = 2 × 1 × 10 × 1 0 - 3 = 20 × 1 0 - 3 % Nitrogen = 14 × 20 × 1 0 - 3 0.75 × 100 = 37.33 %

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