A sample of 0.50 g of an organic compound was treated according to Kjeldahl's method. The ammonia evolved was absorbed in 50 mL of 0.5 M `H_(2)SO_(4)`. The residual acid required 60 mL of 0.5 M solution of NaOH for neutralisation. What would be the percentage composition of nitrogen in the compound?
Text Solution
Verified by Experts
`2NH_(3) + H_(2)SO_(4) to (NH_(4))_(2)SO_(4)` `H_(2)SO_(4) + 2NaOH to Na_(2)SO_(4) + 2H_(2)O` m mol of `H_(2)SO_(4)` used to react with NaOH `=(0.6)/(40)=15` m mol Remaining mmol of `H_(2)SO_(4)=(2.45)/(98)xx10^(3)-15=10` mmol of `NH_(3)` used=`10xx2=20` % N in sample `=(20xx10^(-3)xx14)/(0.5)xx100=56%`
Topper's Solved these Questions
MOLE CONCEPT
ALLEN|Exercise Some Solved Examples|9 Videos
MOLE CONCEPT
ALLEN|Exercise Basic Exercise|29 Videos
METALLURGY
ALLEN|Exercise EXERCISE-05 [B]|26 Videos
p-Block Element
ALLEN|Exercise All Questions|20 Videos
Similar Questions
Explore conceptually related problems
0.50 gm of an organic compound was treated according to Kjeldahl's meghod. The ammonia evolved was absorbed in 50 ml of 0.5 MH_2SO_4 . The residual acid required 60 ml of (M)/(2)NaOH solution. Find the percentage of nitrogen in the compound.
0.4 gm of an organic compound was treated according to Kjeldahl's method. The ammonia evoled was absorbed in 50 ml or 0.5MH_3PO_3 . The residual acid required 30 ml of 0.5MCa(OH)_2 Find the percentage of N_2 in the compound.
0.303 g of an organic compound was analysed for nitrogen by Kjeldahl's method. The ammonia evolved was absorbed in 50 ml of 0.1 N H_2 SO_4 . The excess acid required 25 ml of 0.1 N NaOH for neutralisation. Calculate the percentage of nitrogen in the compound.
A sample of 1.0 gm of organic compound was treated with NaOH and NH_(3) evolved was absorbed in 70ml 0.5M H_(2)SO_(4) . The residual acid required 65 ml of 0.5MNaOH solution of neutraization in Kjeldahl's method. What is the percentage of nitrogen in organic compound?
29.5 mg of an organic compound containing nitrogen was digested according to Kjeldahl's method and the evolved ammonia was absorbed in 20mL of 0.1M HCL solution. The excess of the acid required 15 mL of 0.1 M NaOH solution for complete neutralization. The percentage of nitrogen in the compound is:
An organic compound contains 69.4% carbon and 5.8% hydrogen. A sample of 0.303 g of this compound was analysed for nitrogen by Kjeldahl's method. The ammonia evolved was absorbed in 50 mL of 0.05 M H_2 SO_4 . The excess acid required 25 mL of 0.1 M NaOH for neutralisation. Determine the molecular formula of the compound, if its molecular mass is 121.
29.5 mg of an organic compound containing nitrogen was digested according to Kjeldahl's method and the evolved ammonia was absorbed in 20 mL of 0.1 M HCl solution. The excess of the acid required 15 mL of 0.1 M NaOH solution for complete neutralization. The percentage of nitrogen in the compounds is
For the estimation of nitrogen, 1.4 g of an organic compound was digested by Kjeldahl's method and the evolved ammonia was absorbed in 60 mL of M//10 sulphuric acid. The unreacted acid required 20 mL of M//10 sodium hydroxide for complete neutralisation. The percentage of nitrogen in the compound is
For the estimation of nitrogen, 1.4 g of an organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in 60 mL of (M)/(10) sulphuric acid. The unreacted acid required 20 mL of (M)/(10) sodium hydroxide of complete neutralization. The percentage of nitrogen in the compound is:
0.70 g of an organic compound was kjeldahlised and the ammonia obtained was passed into 150 ml of (M/5) H_2SO_4 . The excess acid required 100 ml of (M/5) NaOH for neutralisation, the percentage of nitrogen on the organic compound is
