In the sulphur estimation, 0.471 g of an organic compound gave 1.44 g of barium sulphate. The percentage of sulphur in the compound is %. (Nearest integer)

(Atomic mass of Ba = 137 u)

Question

In the sulphur estimation, 0.471 g of an organic compound gave 1.44 g of barium sulphate. The percentage of sulphur in the compound is  %. (Nearest integer)

(Atomic mass of Ba = 137 u)

Canvas Classes · Accepted Answer

Step 1: Recall the Sulphur Estimation Formula

Where molar mass of  = 137 + 32 + 64 = 233 g/mol

Step 2: Substitute Given Values

-  = 1.44 g
-  = 0.471 g

Step 3: Calculate Percentage

Answer: 42 (nearest integer)

Note: This is essentially the same data as POC-064 (0.471 g compound, 1.4439 g BaSO₄ → 42%). The slight difference in BaSO₄ mass (1.44 vs 1.4439) gives the same nearest integer.

Key Points to Remember:
- 
- Shortcut: 
-  = white insoluble precipitate, used gravimetrically
- Bo

More questions from Practical Organic Chemistry