CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Organic Compounds

A sample of 0...

Question

A sample of 0.50 gm of an organic compound was treated according to Kjeldahl's method. The ammonia evolved was absorbed in 50 ml of 0.5 M $H_{2} S O_{4}$ . The residual acid required 60 ml of 0.5 M solution of NaOH for neutralization. Find the percentage composition of nitrogen(X) in the compound.

Open in App

Solution

Total miliequivalent (mEq.) of $H_{2} S O_{4}$ taken
$= 50 \times 0.5 \times 2$
$= 50 m E q .$ (since, it is a dibasic acid)
Excess $H_{2} S O_{4} = m E q .$ of $N a O H$
$= 60 \times 0.5 \times 1 = 30 m E q .$ (since, NaOH is a monoacidic base)
mEq. of $H_{2} S O_{4}$ used to neutralise $N H_{3} = (50 - 30) = 20 m E q .$
Percentage of N $= \frac{1.4 \times m E q . o f H_{2} S O_{4} used to neutralise N H_{3}}{Mass of substance}$
$= \frac{1.4 \times 20}{0.5} = 56$ %
Hence, percentage composition of nitrogen in the compound is $56$ .

Suggest Corrections

thumbs-up

0

Similar questions

Q. 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} S O_{4}

.The residue acid required 60 mL of 0.5 M solution of

N a O H

for neutralisation. What would be the percentage composition of nitrogen in the compound?

Q. A sample of 0.25 g of organic compound was treated according to Kjeldahl's method. The ammonia evolved was absorbed in 25 ml of 0.25 M

H_{2} C O_{4}

. The residual acid required 60 mL of 0.25 M solution of NaOH for neutralisation. Find the percentage composition of nitrogen in the compound.

1.4

g of an organic compound was digested according to Kjeldahl's method and the ammonia evolved was absorbed in

60

M / 10 H_{2} S O_{4}

solution. The excess sulphuric acid required

20

M / 10 N a O H

solution for neutralization. The percentage of nitrogen in the compound is :

0.4 g

of an organic compound was treated according to Kjeldal's method. The ammonia evolved was absorbed in

50 m L

0.5 M H_{3} P O_{3}

. The residual acid required
(30~mL\) of

0.5 M C a (O H)_{2}

. What is the percentage of

N_{2}

in the compound?

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Introduction

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Organic Compounds

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon