Question

29.5 milligrams of an organic compound containing nitrogen was digested according to the method and the evolved Ammonia was observed in 20 ml of 0.1 molar HCL solution the axis of the acid required 50 ml of 0.1 molar and its solution for complete neutralization the percentage of Nitrogen in the compound is ​

Answer 1

Answer:

23.7

Explanation:

given 29.5 milligrams of an organic compound containing nitrogen was digested according to the method and the evolved Ammonia was observed in 20 ml of 0.1 molar HCL solution the excess of the acid required 15 ml of 0.1 molar NAOH solution for complete neutralization the percentage of Nitrogen in the compound is  

The percentage of N according to Kjeldahl’s method = 1.4 x N1 x V / w

N1 is normality of standard acid = 0.1 N

W is mass of organic compound = 29.5 mg = 29.5 x 10^-3 g

V is volume of N1 acid neutralised by ammonia

= (20 – 15) = 5 ml

So percentage N = 1.4 x 0.1 x 5 / 29.5 x 10^-3

                           = 23.7