In the Kjedahl's method for estimation of nitrogen present in soil sample, ammonia evolved from 0.75 g of sample neutralized 1 0 m l of 1 M H 2 S O 4 The percentage of nitrogen in the soil is:

Question

In the Kjedahl's method for estimation of nitrogen present in soil sample, ammonia evolved from 0.75 g of sample neutralized 1 0 m l of 1 M H 2 S O 4 The percentage of nitrogen in the soil is:, 37.83, 45.3 2, 35.33, 45.33

MARKS App · Accepted Answer

moles of 1 M H 2 S O 4 = 10 m m o l moles of N H 3 consumed = 20 m m o l Weight of N = 14 × 20 1000 g = 0.280 g % N = 0 .280 0 .75 × 100 = 37 .33 %

Search any question & find its solution

Looking for more such questions to practice?