Question

Question 12.34 0.3780 g of an organic chloro compound gave 0.5740 g of silver chloride in Carius estimation. Calculate the percentage of chlorine present in the compound.

Class XI Organic Chemistry : Some Basic Principles and Techniques Page 364

Answer 1

Hi

Here is your answer,

The mass of the organic compound taken = 0.3780 g 

Mass of AgCl formed = 0.5740 g

Percentage of chlorine = 35.5/143.5 × mass of AgCl formed/mass of substance taken × 100

 = 35.5/143.5 × 0.5740/0.3780 ×100 = 37.566 %

Answer 2

the mass of organic compound taken is 0.3780g
mass of AgCl formed = 0.5740g
we know,
atomic mass of Chlorine = 35.5 g/mol
molecular mass of AgCl = 108 + 35.5 = 143.5 g/mol
now,
Applying the relation,
The percentage of chlorine = (35.5/143.5) ×{mass of AgCl formed/mass of organic substance taken} ×100
= (35.5/143.5) ×{0.5740/0.3780} × 100
= (35.5 × 574 × 100}/{143.5 × 378}
= 37.566 %

hence, the percentage of Cl in the compound is 37.566% .