0.25 g of an organic compound containing chlorine gave 0.40 g of silver chloride in Carius estimation. The percentage of chlorine present in the compound is . [in nearest integer]

(Given: Molar mass

Question

0.25 g of an organic compound containing chlorine gave 0.40 g of silver chloride in Carius estimation. The percentage of chlorine present in the compound is . [in nearest integer]

(Given: Molar mass of Ag is 108  and that of Cl is 35.5 )

Canvas Classes · Accepted Answer

Step 1: Recall the Carius Method for Chlorine

In the Carius method:

Where molar mass of  = 108 + 35.5 = 143.5 g/mol

Step 2: Calculate Mass of Chlorine

Given:  = 0.40 g

Step 3: Calculate Percentage of Chlorine

Mass of compound = 0.25 g

Verification using direct formula:

Answer: 40 (nearest integer)

Key Points to Remember:
- Chlorine formula: 
-  (mass fraction of Cl in AgCl)
- AgCl = white precipitate; insoluble in dilute HNO₃; soluble in NH₃(aq)
- Carius tube must withstand high p

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