Home
Class 11
CHEMISTRY
A sample of 0.50 g of an organic compoun...

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. Find the percentage composition of nitrogen in the compound.

Text Solution

Verified by Experts

Step I. calculation of volume of unused acid
Volume of `NaOH` solution required `=60 cm^(3)`
Normality of `NaOH` solution `=1//2 N`
Normality of `H_(2)SO_(4)` solution `= 1N`
Volume of unused acid can be calculated by applying normality equation
`ubrace(N_(1)V_(1))_("Acid")=ubrace(N_(1)V_(1))_("Base")
1xxV=1/2xx60=30 cm^(3)`
Step II. Calculation of volume of acid used
Volume of acid added `=50 cm^(3)`
Volume of unused acid `=30 cm^(3)`
Volume of acid used `=(50-30)=20 cm^(3)`
Step III. Calculating of percentage of nitrogen
Mass of compound `=0.50 g`
Volume of acid used `=20 cm^(3)`
Normality of acid used `= 1 N`
Persentage of `N=(1.4xx"Volume of acid used"xx"Normality of acid used")/("Mass of the compound")`
`=(1.4xx20xx1)/0.50=56%`
Promotional Banner

Similar Questions

Explore conceptually related problems

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?

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:

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

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.

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: